xref: /dports/mail/cyrus-imapd34/cyrus-imapd-3.4.2/lib/imapoptions

# things inside of C comments get copied to the manpage
# things starting with # are ignored

/* .\" -*- nroff -*-
.TH IMAPD.CONF 5 "Project Cyrus" CMU
.\"
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.SH NAME
imapd.conf \- IMAP configuration file
.SH DESCRIPTION
\fB/etc/imapd.conf\fR
is the configuration file for the Cyrus IMAP server.  It defines
local parameters for IMAP.
.PP
Each line of the \fB/etc/imapd.conf\fR file has the form
.IP
\fIoption\fR: \fIvalue\fR
.PP
where \fIoption\fR is the name of the configuration option being set
and \fIvalue\fR is the value that the configuration option is being
set to.
.PP
Although there is no limit to the length of a line, a ``\\''
(backslash) character may be used as the last character on a line to
force it to continue on the next one.  No additional whitespace is
inserted before or after the ``\\''.  Note that a line that is split
using ``\\'' character(s) is still considered a single line.

For example
.IP
\fIoption\fR:\\
.br
.in +1
\fIvalue\fR1 \fIvalue\fR2 \\
.br
.in +1
\fIvalue\fR3
.PP
is equivalent to
.IP
\fIoption\fR: \fIvalue\fR1 \fIvalue\fR2   \fIvalue\fR3
.PP
Blank lines and lines beginning with ``#'' are ignored.
.PP
For boolean and enumerated options, the values ``yes'', ``on'', ``t'',
``true'' and ``1'' turn the option on, the values ``no'', ``off'',
``f'', ``false'' and ``0'' turn the option off.
.PP
Duration options take the form of a number followed by a unit, for example
\fB32m\fR (32 minutes).  Units are \fBd\fR (days), \fBh\fR (hours), \fBm\fR
(minutes) and \fBs\fR (seconds).  Multiple units can be combined and will
be summed together, for example \fB1h30m\fR is equivalent to \fB90m\fR.  If
no unit is specified, an option-specific backward-compatible default unit
is assumed (documented on an option-by-option basis).  These are simple time
units: 1d=24h, 1h=60m, 1m=60s (daylight savings, timezones, leap adjustments,
etc are not considered).
.SH FIELD DESCRIPTIONS
.PP
The sections below detail options that can be placed in the
\fB/etc/imapd.conf\fR file, and show each option's default value.
Some options have no default value, these are listed with
``<no default>''.  Some options default to the empty string, these
are listed with ``<none>''.
*/

# OPTIONS

{ "addressbookprefix", "#addressbooks", STRING, "2.5.0" }
/* The prefix for the addressbook mailboxes hierarchies.  The hierarchy
   delimiter will be automatically appended.  The public addressbook
   hierarchy will be at the toplevel of the shared namespace.  A
   user's personal addressbook hierarchy will be a child of their Inbox. */

{ "admins", "", STRING, "2.3.17" }
/* The list of userids with administrative rights.  Separate each userid
   with a space.  Sites using Kerberos authentication may use
   separate "admin" instances.
.PP
   Note that accounts used by users should not be administrators.
   Administrative accounts should not receive mail.  That is, if user
   "jbRo" is a user reading mail, he should not also be in the admins line.
   Some problems may occur otherwise, most notably the ability of
   administrators to create top-level mailboxes visible to users,
   but not writable by users. */

{ "afspts_localrealms", NULL, STRING, "2.3.17" }
/* The list of realms which are to be treated as local, and thus stripped
   during identifier canonicalization (for the AFSPTS ptloader module).
   This is different from loginrealms in that it occurs later in the
   authorization process (as the user id is canonified for PTS lookup) */

{ "afspts_mycell", NULL, STRING, "2.3.17" }
/* Cell to use for AFS PTS lookups.  Defaults to the local cell. */

{ "allowallsubscribe", 0, SWITCH, "2.3.17" }
/* Allow subscription to nonexistent mailboxes.  This option is
   typically used on backend servers in a Murder so that users can
   subscribe to mailboxes that don't reside on their "home" server.
   This option can also be used as a workaround for IMAP clients which
   don't play well with nonexistent or unselectable mailboxes (e.g.,
   Microsoft Outlook). */

{ "allowanonymouslogin", 0, SWITCH, "2.3.17" }
/* Permit logins by the user "anonymous" using any password.  Also
   allows use of the SASL ANONYMOUS mechanism. */

{ "allowapop", 1, SWITCH, "2.3.17" }
/* Allow use of the POP3 APOP authentication command.
.PP
  Note that this command requires that SASL is compiled with APOP
  support, that the plaintext passwords are available in a SASL auxprop
  backend (e.g., sasldb), and that the system can provide enough entropy
  (e.g., from /dev/urandom) to create a challenge in the banner. */

{ "allowdeleted", 0, SWITCH, "3.1.8" }
/* Allow access to deleted and expunged data via vendor.cmu-* access */

{ "allownewnews", 0, SWITCH, "2.3.17" }
/* Allow use of the NNTP NEWNEWS command.
.PP
  Note that this is a very expensive command and should only be
  enabled when absolutely necessary. */

{ "allowplaintext", 0, SWITCH, "3.0.0" }
/* If enabled, allows the use of cleartext passwords on the wire.
.PP
  By default, the use of cleartext passwords requires a TLS/SSL
  encryption layer to be negotiated prior to any cleartext
  authentication mechanisms being advertised or allowed.  To require a
  TLS/SSL encryption layer to be negotiated prior to ANY
  authentication, see the \fItls_required\fR option. */

{ "allowsetacl", 1, SWITCH, "3.1.8" }
/* Defaults to enabled.  If disabled, disallows the use of the SETACL
   command at all via IMAP. */

{ "allowusermoves", 0, SWITCH, "2.3.17" }
/* Allow moving user accounts (with associated meta-data) via RENAME
   or XFER.
.PP
  Note that measures should be taken to make sure that the user being
  moved is not logged in, and cannot login during the move.  Failure
  to do so may result in the user's meta-data (seen state,
  subscriptions, etc) being corrupted or out of date. */

{ "altnamespace", 1, SWITCH, "3.0.0" }
/* Use the alternate IMAP namespace, where personal folders reside at the
   same level in the hierarchy as INBOX.
.PP
   This option ONLY applies where interaction takes place with the
   client/user.  Currently this is limited to the IMAP protocol (imapd)
   and Sieve scripts (lmtpd).  This option does NOT apply to admin tools
   such as cyradm (admins ONLY), reconstruct, quota, etc., NOR does it
   affect LMTP delivery of messages directly to mailboxes via
   plus-addressing.  The default changed in 3.0 from off to on. */

{ "altprefix", "Alt Folders", STRING, "3.0.0" }
/* Alternative INBOX spellings that can't be accessed in altnamespace
   otherwise go under here */

{ "annotation_db", "twoskip", STRINGLIST("skiplist", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for mailbox annotations. */

{ "annotation_db_path", NULL, STRING, "2.5.0" }
/* The absolute path to the annotations db file.  If not specified,
   will be configdirectory/annotations.db */

{ "anyoneuseracl", 1, SWITCH, "2.3.17" }
/* Should non-admin users be allowed to set ACLs for the 'anyone'
   user on their mailboxes?  In a large organization this can cause
   support problems, but it's enabled by default. */

{ "annotation_allow_undefined", 0, SWITCH, "2.5.0" }
/* Allow clients to store values for entries which are not
   defined either by Cyrus or in the annotations_definitions
   file. */

{ "annotation_definitions", NULL, STRING, "2.5.0" }
/* File containing external (third-party) annotation definitions.
.PP
Each line of the file specifies the properties of an annotation and
has the following form:

.IP
\fIname\fR, \fIscope\fR, \fIattrib-type\fR, \fIproxy-type\fR,
\fIattrib-names\fR, \fIacl\fR
.\"
.IP \fIname\fR 5
is the hierarchical name as in RFC 5257 or RFC 5464 (in the latter case,
without the leading \fB/shared\fR or \fB/private\fR).  For example,
/vendor/acme/blurdybloop.
.\"
.IP \fIscope\fR 5
specifies whether the annotation is for the \fBserver\fR, a
\fBmailbox\fR, or a \fBmessage\fR.
.\"
.IP \fIattrib-type\fR 5
.RS 5
specifies the attribute data type, which is used only to check the
string value passed by clients when setting annotations.  The
\fIattrib-type\fR is one of:
.\"
.IP \fBstring\fR 5
any value is accepted.
.\"
.IP \fBcontent-type\fR 5
this obsolete data type, which was useful for early drafts of the standard,
is accepted but silently translated to \fBstring\fR.
.\"
.IP \fBboolean\fR 5
only the strings "true" or "false" are accepted.  Checking is
case-insensitive but the value is forced to lowercase.
.\"
.IP \fBint\fR 5
integers are accepted.
.\"
.IP \fBuint\fR 5
non-negative integers are accepted.
.\"
.RE
.\"
.IP \fIproxy-type\fR 5
specifies whether this attribute is for the \fBbackend\fR or
\fBproxy\fR servers or both (\fBproxy_and_backend\fR)
.\"
.IP \fIattrib-names\fR 5
is the space-separated list of available attributes for the
annotation. Possible attribute names are \fBvalue.shared\fR,
\fBvalue.priv\fR, and \fBvalue\fR (which permits both \fBvalue.priv\fR
and \fBvalue.shared\fR).  The attribute names \fBsize\fR,
\fBsize.shared\fR, and \fBsize.priv\fR are accepted but ignored; these
attributes are automatically provided by the server if the corresponding
\fBvalue\fR attribute is specified.  Some obsolete attributes, which were
defined early drafts of the standard, are accepted and ignored with a
warning.
.\"
.IP \fIextra-permissions\fR 5
is the extra ACL permission bits required for setting this annotation, in
standard IMAP ACL permission bit string format.  Note that this is
in addition to the permission bits specified in RFC 5257 and RFC 5464,
so leaving this field empty is harmless.  Note also that there is no way
to specify that an annotation can only be set by an admin user; in
particular the \fBa\fP permission bit does not achieve this.
.PP
Blank lines and lines beginning with ``#'' are ignored.
*/

{ "annotation_callout", NULL, STRING, "2.5.0" }
/* The pathname of a callout to be used to automatically add annotations
   or flags to a message when it is appended to a mailbox.  The path can
   be either an executable (including a script), or a UNIX domain
   socket.  */
{ "annotation_callout_disable_append", 0, SWITCH, "3.1.2" }
/* Disables annotations on append with xrunannotator */
{ "annotation_enable_legacy_commands", 0, SWITCH, "3.1.6" }
/* Whether to enable the legacy GETANNOTATION/SETANNOTATION commands.
   These commands are deprecated and will be removed in the future,
   but might be useful in the meantime for supporting old clients that
   do not implement the RFC 5464 IMAP METADATA extension. */

{ "aps_topic", NULL, STRING, "3.0.0" }
/* Topic for Apple Push Service registration. */
{ "aps_topic_caldav", NULL, STRING, "3.0.0" }
/* Topic for Apple Push Service registration for CalDAV. */
{ "aps_topic_carddav", NULL, STRING, "3.0.0" }
/* Topic for Apple Push Service registration for CardDAV. */

{ "archive_enabled", 0, SWITCH, "3.0.0" }
/* Is archiving enabled for this server.  You also need to have an
   archivepartition for the mailbox.  Archiving allows older email
   to be stored on slower, cheaper disks - even within the same
   mailbox, as distinct from partitions. */

{ "archive_days", NULL, DURATION, "3.1.8", "3.1.8", "archive_after" }
/* Deprecated in favour of \fIarchive_after\fR. */

{ "archive_after", "7d", DURATION, "3.1.8" }
/* The duration after which to move messages to the archive partition
   if archiving is enabled.
.PP
   For backward compatibility, if no unit is specified, days is
   assumed.  */
*/

{ "archive_maxsize", 1024, INT, "3.0.0" }
/* The size in kilobytes of the largest message that won't be archived
   immediately.  Default is 1Mb */

{ "archive_keepflagged", 0, SWITCH, "3.0.0" }
/* If set, messages with the \\Flagged system flag won't be archived,
   provided they are smaller than \fBarchive_maxsize\fR. */

# Commented out - there's no such thing as "archivepartition-name",
# but we need this for the man page
# { "archivepartition-name", NULL, STRING, "3.0.0" }
/* The pathname of the archive partition \fIname\fR, corresponding to
   spool partition \fBpartition-name\fR.  For any mailbox residing in
   a directory on \fBpartition-name\fR, the archived messages will be
   stored in a corresponding directory on \fBarchivepartition-name\fR.
   Note that not every \fBpartition-name\fR option is strictly required
   to have a corresponding \fBarchivepartition-name\fR option, but that
   without one there's no benefit to enabling archiving. */

{ "auditlog", 0, SWITCH, "2.4.0" }
/* Should cyrus output log entries for every action taken on a message
   file or mailboxes list entry?  It's noisy so disabled by default, but
   can be very useful for tracking down what happened if things look strange */

{ "auth_mech", "unix", STRINGLIST("unix", "pts", "krb", "krb5"), "2.3.17" }
/* The authorization mechanism to use. */

{ "autocreateinboxfolders", NULL, STRING, "2.5.0", "2.5.0", "autocreate_inbox_folders" }
/* Deprecated in favor of \fIautocreate_inbox_folders\fR. */

{ "autocreatequota", 0, INT, "2.5.0", "2.5.0", "autocreate_quota" }
/* Deprecated in favor of \fIautocreate_quota\fR. */

{ "autocreatequotamsg", -1, INT, "2.5.0", "2.5.0", "autocreate_quota_messages" }
/* Deprecated in favor of \fIautocreate_quota_messages\fR. */

{ "autosievefolders", NULL, STRING, "2.5.0", "2.5.0", "autocreate_sieve_folders" }
/* Deprecated in favor of \fIautocreate_sieve_folders\fR. */

{ "generate_compiled_sieve_script", 0, SWITCH, "2.5.0", "2.5.0", "autocreate_sieve_script_compile" }
/* Deprecated in favor of \fIautocreate_sieve_script_compile\fR. */

{ "autocreate_sieve_compiled_script", NULL, STRING, "2.5.0", "2.5.0", "autocreate_sieve_script_compiled" }
/* Deprecated in favor of \fIautocreate_sieve_script_compiled\fR. */

{ "autosubscribeinboxfolders", NULL, STRING, "2.5.0", "2.5.0", "autocreate_subscribe_folders" }
/* Deprecated in favor of \fIautocreate_subscribe_folders\fR. */

{ "autosubscribesharedfolders", NULL, STRING, "2.5.0", "2.5.0", "autocreate_subscribe_sharedfolders" }
/* Deprecated in favor of \fIautocreate_subscribe_sharedfolders\fR. */

{ "autosubscribe_all_sharedfolders", 0, SWITCH, "2.5.0", "2.5.0", "autocreate_subscribe_sharedfolders_all" }
/* Deprecated in favor of \fIautocreate_subscribe_sharedfolders_all\fR. */

# Commented out - there's no single setting "autocreate_acl",
# but we need this for the man page
# { "autocreate_acl", NULL, STRING, "3.2.0" }
/* If folders are to be created by \fIautocreate_inbox_folders\fR, this
   setting can be used to apply additional ACLs to the autocreated
   folders.  The syntax is "autocreate_acl folder identifier rights",
   where \fIfolder\fR must match one of the \fIautocreate_inbox_folders\fR
   folders, \fIidentifier\fR must be a valid cyrus identifier, and
   \fIrights\fR must be a valid cyrus rights string.  Multiple
   identifier|rights pairs can be assigned to a single folder by providing
   this setting multiple times.
.PP
   For example, "autocreate_acl Plus anyone p" would allow lmtp delivery
   to a folder named "Plus".
   */


{ "autocreate_inbox_folders", NULL, STRING, "2.5.0" }
/* If a user does not have an INBOX already, and the INBOX is to be
   created, create the list of folders in this setting as well.
   \fIautocreate_inbox_folders\fR is a list of INBOX's subfolders
   separated by a "|", that are automatically created by the server
   under the following two scenarios. Leading and trailing whitespace is
   stripped, so "Junk | Trash" results in two folders: "Junk" and
   "Trash".  See also the \fIxlist-flag\fR option, for setting
   special-use flags on autocreated folders.
.PP
   INBOX folders are created under both the following conditions:
.\"
.IP 1.
   The user logins via the IMAP or the POP3 protocol.
   \fIautocreate_quota\fR option must have a value of zero or greater.
.\"
.IP 2.
   A message arrives for the user through the \fIlmtpd(8)\fR.
   \fIautocreate_post\fR option must be enabled.
.PP
 */

{ "autocreate_post", 0, SWITCH, "2.5.0" }
/* If enabled, when \fIlmtpd(8)\fR receives an incoming mail for an
   INBOX that does not exist, then the INBOX is automatically created
   by \fIlmtpd(8)\fR and delivery of the message continues. */

{ "autocreate_quota", -1, INT, "2.5.0" }
/* If set to a value of zero or higher, users have their INBOX folders
   created upon a successful login event or upon \fIlmtpd(8)\fR
   message delivery if \fIautocreate_post\fR is enabled, provided their
   INBOX did not yet already exist.
.PP
   The user's quota is set to the value if it is greater than zero,
   otherwise the user has unlimited quota.
.PP
   Note that quota is specified in kilobytes. */

{ "autocreate_quota_messages", -1, INT, "3.0.0" }
/* If set to a value of zero or higher, users who have their INBOX
   folders created upon a successful login event (see
   \fIautocreate_quota\fR), or upon \fIlmtpd(8)\fR message delivery if
   \fIautocreate_post\fR is enabled, receive the message quota
   configured in this option.
.PP
   The default of -1 disables assigning message quota.
.PP
   For consistency with \fIautocreate_quota\fR, a value of zero is treated
   as unlimited message quota, rather than a message quota of zero. */

{ "autocreate_sieve_folders", NULL, STRING, "2.5.0" }
/* A "|" separated list of subfolders of INBOX that will be
   automatically created, if requested by a sieve filter, through the
   "fileinto" action. The default is to create no folders
   automatically.
.PP
   Leading and trailing whitespace is stripped from each folder, so a
   setting of "Junk | Trash" will create two folders: "Junk" and
   "Trash". */

{ "autocreate_sieve_script", NULL, STRING, "2.5.0" }
/* The full path of a file that contains a sieve script. This script
   automatically becomes a user's initial default sieve filter script.
.PP
    When this option is not defined, no default sieve filter is created.
    The file must be readable by the Cyrus daemon. */

{ "autocreate_sieve_script_compile", 0, SWITCH, "2.5.0" }
/* If set to yes and no compiled sieve script file exists, the sieve script which is
   compiled on the fly will be saved in the file name that autocreate_sieve_compiledscript
   option points to. In order a compiled script to be generated, autocreate_sieve_script and
   autocreate_sieve_compiledscript must have valid values */

{ "autocreate_sieve_script_compiled", NULL, STRING, "2.5.0" }
/* The full path of a file that contains a compiled in bytecode sieve script. This script
   automatically becomes a user's initial default sieve filter script.  If this option is
   not specified, or the filename doesn't exist then the script defined by
   autocreate_sieve_script is compiled on the fly and installed as the user's default
   sieve script */

{ "autocreate_subscribe_folders", NULL, STRING, "2.5.0" }
/* A list of folder names, separated by "|", that the users get automatically subscribed to,
   when their INBOX is created. These folder names must have been included in the
   autocreateinboxfolders option of the imapd.conf. */

{ "autocreate_subscribe_sharedfolders", NULL, STRING, "2.5.0" }
/* A list of shared folders (bulletin boards), separated by "|", that the users get
   automatically subscribed to, after their INBOX is created. The shared folder must
   have been created and the user must have the required permissions to get subscribed
   to it. Otherwise, subscribing to the shared folder fails. */

{ "autocreate_subscribe_sharedfolders_all", 0, SWITCH, "2.5.0" }
/* If set to yes, the user is automatically subscribed to all shared folders, one has permission
   to subscribe to. */

{ "autocreate_users", "anyone", STRING, "2.5.0" }
/* A space separated list of users and/or groups that are allowed their INBOX to be
   automatically created. */

{ "autoexpunge", 0, SWITCH, "3.1.7" }
/* If set to yes, then all \Deleted messages will be automatically expunged whenever
   an index is closed, whether CLOSE, UNSELECT, SELECT or on disconnect */

# Commented out - there's no such thing as "backuppartition-name",
# but we need this for the man page
# { "backuppartition-name", NULL, STRING, "3.0.0" }
/* The pathname of the backup partition \fIname\fR.  At least one backup
   partition pathname MUST be specified if backups are in use.  Note that
   there is no relationship between spool partitions and backup partitions. */

{ "backup_compact_minsize", 0, INT, "3.0.0" }
/* The minimum size in kilobytes of chunks in each backup.  The compact tool
   will try to combine adjacent chunks that are smaller than this.
.PP
   Setting this value to zero or negative disables combining of chunks. */

{ "backup_compact_maxsize", 0, INT, "3.0.0" }
/* The maximum size in kilobytes of chunks in each backup.  The compact tool
   will try to split chunks larger than this into smaller chunks.
.PP
   Setting this value to zero or negative disables splitting of chunks. */

{ "backup_compact_work_threshold", 1, INT, "3.0.0" }
/* The number of chunks that must obviously need compaction before the compact
   tool will go ahead with the compaction.  If set to less than one, the value
   is treated as being one. */

{ "backup_staging_path", NULL, STRING, "3.0.0" }
/* The absolute path of the backup staging area.  If not specified,
   will be temp_path/backup */

{ "backup_retention_days", NULL, DURATION, "3.1.8", "3.1.8", "backup_retention" }
/* Deprecated in favor of \fIbackup_retention\fR. */

{ "backup_retention", "7d", DURATION, "3.1.0" }
/* How long to keep content in backup after it has been deleted
   from the source.  If set to a negative value or zero, deleted content
   will be kept indefinitely.
.PP
   For backward compatibility, if no unit is specified, days is
   assumed.  */

{ "backup_db", "twoskip", STRINGLIST("skiplist", "sql", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the backup locations database. */

{ "backup_db_path", NULL, STRING, "3.0.0" }
/* The absolute path to the backup db file.  If not specified,
   will be configdirectory/backups.db */

{ "backup_keep_previous", 0, SWITCH, "3.0.0" }
/* Whether the \fBctl_backups compact\fR and \fBctl_backups reindex\fR
   commands should preserve the original file.  The original file will
   be named with a timestamped suffix.  This is mostly useful for
   debugging.
.PP
   Note that with this enabled, compacting a backup will actually
   increase the disk used by it (because there will now be an extra
   copy: the original version, and the compacted version). */

{ "boundary_limit", 1000, INT, "2.5.0" }
/* messages are parsed recursively and a deep enough MIME structure
   can cause a stack overflow.  Do not parse deeper than this many
   layers of MIME structure.  The default of 1000 is much higher
   than any sane message should have. */

{ "caldav_allowattach", 1, SWITCH, "3.0.0" }
/* Enable managed attachments support on the CalDAV server. */

{ "caldav_allowcalendaradmin", 0, SWITCH, "3.1.2" }
/* Enable per-user calendar administration web UI on the CalDAV server. */

{ "caldav_allowscheduling", "on", ENUM("off", "on", "apple"), "2.5.0" }
/* Enable calendar scheduling operations. If set to "apple", the
   server will emulate Apple CalendarServer behavior as closely as
   possible. */

{ "caldav_create_attach", 1, SWITCH, "3.0.0" }
/* Create the 'Attachments' collection if it doesn't already exist */

{ "caldav_create_default", 1, SWITCH, "3.0.0" }
/* Create the 'Default' calendar if it doesn't already exist */

{ "caldav_create_sched", 1, SWITCH, "3.0.0" }
/* Create the 'Inbox' and 'Outbox' calendars if they don't already exist */

{ "caldav_historical_age", "7d", DURATION, "3.1.8" }
/* How long after an occurrence of event or task has concluded
   that it is considered 'historical'.  Changes to historical
   occurrences of events or tasks WILL NOT have invite or reply
   messages sent for them.  A negative value means that events
   and tasks are NEVER considered historical.
.PP
   For backward compatibility, if no unit is specified, days is
   assumed.  */
*/

{ "caldav_maxdatetime", "20380119T031407Z", STRING, "2.5.0" }
/* The latest date and time accepted by the server (ISO format).  This
   value is also used for expanding non-terminating recurrence rules.
.PP
   Note that increasing this value will require the DAV databases for
   calendars to be reconstructed with the \fBdav_reconstruct\fR
   utility in order to see its effect on serer-side time-based
   queries. */

{ "caldav_mindatetime", "19011213T204552Z", STRING, "2.5.0" }
/* The earliest date and time accepted by the server (ISO format). */

{ "caldav_realm", NULL, STRING, "2.5.0" }
/* The realm to present for HTTP authentication of CalDAV resources.
   If not set (the default), the value of the "servername" option will
   be used.*/

{ "calendarprefix", "#calendars", STRING, "2.5.0" }
/* The prefix for the calendar mailboxes hierarchies.  The hierarchy
   delimiter will be automatically appended.  The public calendar
   hierarchy will be at the toplevel of the shared namespace.  A
   user's personal calendar hierarchy will be a child of their Inbox. */

{ "calendar_default_displayname", "personal", STRING, "3.3.0" }
/* The displayname to be used when creating a user's 'Default' calendar. */

{ "calendar_user_address_set", NULL, STRING, "2.5.0" }
/* Space-separated list of domains corresponding to calendar user
   addresses for which the server is responsible.  If not set (the
   default), the value of the "servername" option will be used. */

{ "calendar_component_set", "VEVENT VTODO VJOURNAL VFREEBUSY VAVAILABILITY VPOLL", BITFIELD("VEVENT", "VTODO", "VJOURNAL", "VFREEBUSY", "VAVAILABILITY", "VPOLL"), "3.1.7" }
/* Space-separated list of iCalendar component types that calendar
   object resources may contain in a calendar collection.
   This restriction is only set at calendar creation time and only
   if the CalDAV client hasn't specified a restriction in the creation
   request. */

{ "carddav_allowaddmember", 0, SWITCH, "3.1.3" }
/* Enable support for POST add-member on the CardDAV server. */

{ "carddav_allowaddressbookadmin", 0, SWITCH, "3.1.2" }
/* Enable per-user addressbook administration web UI on the CardDAV server. */

{ "carddav_realm", NULL, STRING, "2.5.0" }
/* The realm to present for HTTP authentication of CardDAV resources.
   If not set (the default), the value of the "servername" option will
   be used.*/

{ "carddav_repair_vcard", 0, SWITCH, "3.0.0", "3.3.1" }
/* If enabled, VCARDs with invalid content are attempted to be repaired
   during creation. */

{ "chatty", 0, SWITCH, "2.5.0" }
/* If yes, syslog tags and commands for every IMAP command, mailboxes
   for every lmtp connection, every POP3 command, etc */

{ "client_bind", 0, SWITCH, "3.0.0" }
/* If enabled, a specific IP will be bound when performing a client
   connection.  \fBclient_bind_name\fR is used if it is set, otherwise
   \fBservername\fR is used.  This is useful on multi-homed servers where
   Cyrus should not use other services' interfaces.
.PP
   If not enabled (the default), no bind will be performed.  Client
   connections will use an IP chosen by the operating system. */

{ "client_bind_name", NULL, STRING, "3.0.0" }
/* IPv4, IPv6 address or hostname to bind for client connections when
   \fBclient_bind\fR is enabled.  If not set (the default),
   \fRservername\fR will be used. */

{ "client_timeout", "10s", DURATION, "3.1.8" }
/* Time to wait before returning a timeout failure when performing a
   client connection (e.g. in a murder environment).
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed.  */

{ "commandmintimer", NULL, STRING, "2.4.0" }
/* Time in seconds. Any imap command that takes longer than this
   time is logged. */

{ "configdirectory", NULL, STRING, "2.3.17" }
/* The pathname of the IMAP configuration directory.  This field is
   required. */

{ "createonpost", 0, SWITCH, "2.5.0", "2.5.0", "autocreate_post" }
/* Deprecated in favor of \fIautocreate_post\fR. */

{ "conversations", 0, SWITCH, "3.0.0" }
/* Enable the XCONVERSATIONS extensions.  Extract conversation
   tracking information from incoming messages and track them
   in per-user databases. */

{ "conversations_counted_flags", NULL, STRING, "3.0.0" }
/* space-separated list of flags for which per-conversation counts
   will be kept.  Note that you need to reconstruct the conversations
   database with ctl_conversationsdb if you change this option on a
   running server, or the counts will be wrong.  */

{ "conversations_db", "skiplist", STRINGLIST("skiplist", "sql", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the per-user conversations database. */

{ "conversations_expire_days", NULL, DURATION, "3.1.8", "3.1.8", "conversations_expire_after" }
/* Deprecated in favor of \fIconversations_expire_after\fR. */

{ "conversations_expire_after", "90d", DURATION, "3.1.8" }
/* How long the conversations database keeps the message tracking
   information needed for receiving new messages in existing
   conversations.
.PP
   For backward compatibility, if no unit is specified, days is
   assumed. */

{ "conversations_keep_existing", 1, SWITCH, "3.3.0" }
/* during conversations cleanup, don't clean up if there are still existing emails
   with one of the mentioned CIDs */

{ "conversations_max_thread", 100, INT, "3.1.1" }
/* maximum size for a single thread.  Threads will split if they have this many
   messages in them and another message arrives */

{ "conversations_max_guidrecords", 5000, INT, "3.3.0" }
/* maximum records with the same guid.  This is just a sanity check to stop the same
   email being added and removed over and over, so the default is 5000 */

{ "conversations_max_guidexists", 100, INT, "3.3.0" }
/* maximum records with the same guid.  This maps to "labels", so with the default
   of 100, you can only have 100 labels on an email in JMAP */

{ "conversations_max_guidinfolder", 10, INT, "3.3.0" }
/* maximum records with the same guid in the same folder. You can't do this via JMAP,
   but could via IMAP.  The default of 10 should be heaps normally! */

{ "crossdomains", 0, SWITCH, "3.0.0" }
/* Enable cross domain sharing.  This works best with alt namespace and
   unix hierarchy separators on, so you get Other Users/foo@example.com/... */

{ "crossdomains_onlyother", 0, SWITCH, "3.0.0" }
/* only show the domain for users in other domains than your own (for
   backwards compatibility if you're already sharing */

{ "cyrus_group", NULL, STRING, "3.1.7" }
/* The name of the group Cyrus services will run as.  If not configured, the
   primary group of cyrus_user will be used. Can be further overridden by
   setting the $CYRUS_GROUP environment variable. */

{ "cyrus_user", NULL, STRING, "3.0.0" }
/* The username to use as the 'cyrus' user.  If not configured, the compile
   time default will be used. Can be further overridden by setting the
   $CYRUS_USER environment variable. */

{ "davdriveprefix", "#drive", STRING, "3.0.0" }
/* The prefix for the DAV storage mailboxes hierarchies.  The hierarchy
   delimiter will be automatically appended.  The public storage
   hierarchy will be at the toplevel of the shared namespace.  A
   user's personal storage hierarchy will be a child of their Inbox. */

{ "davnotificationsprefix", "#notifications", STRING, "3.0.0" }
/* The prefix for the DAV notifications hierarchy.  The hierarchy
   delimiter will be automatically appended.  The public notifications
   hierarchy will be at the toplevel of the shared namespace.  A
   user's personal notifications hierarchy will be a child of their Inbox. */

{ "dav_realm", NULL, STRING, "2.5.0" }
/* The realm to present for HTTP authentication of generic DAV
   resources (principals).  If not set (the default), the value of the
   "servername" option will be used.*/

{ "dav_lock_timeout", "20s", DURATION, "3.1.8" }
/* The maximum time to wait for a write lock on the per-user DAV database
   before timeout. For HTTP requests, the HTTP status code 503 is returned
   if the lock can not be obtained within this time.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "debug_command", NULL, STRING, "2.3.17" }
/* Debug command to be used by processes started with -D option.  The string
   is a C format string that gets 3 options: the first is the name of the
   executable (as specified in the cmd parameter in cyrus.conf). The second
   is the pid (integer) and the third is the service ID.
   Example: /usr/local/bin/gdb /usr/cyrus/bin/%s %d */

{ "defaultacl", "anyone lrs", STRING, "2.3.17" }
/* The Access Control List (ACL) placed on a newly-created (non-user)
   mailbox that does not have a parent mailbox. */

{ "defaultdomain", "internal", STRING, "3.0.0" }
/* The default domain for virtual domain support */

{ "defaultpartition", NULL, STRING, "2.3.17" }
/* The partition name used by default for new mailboxes.  If not
   specified, the partition with the most free space will be used for
   new mailboxes.
.PP
   Note that the partition specified by this option must also be
   specified as \fIpartition-name\fR, where you substitute 'name'
   for the alphanumeric string you set \fIdefaultpartition\fR to. */

{ "defaultsearchtier", "", STRING, "3.0.0" }
/* Name of the default tier that messages will be indexed to. Search
   indexes can be organized in tiers to allow index storage in different
   directories and physical media. See the man page of squatter for
   details. The default search tier also requires the definition
   of an according \fIsearchtierpartition-name\fR entry.
.PP
   This option MUST be specified for xapian search. */

{ "defaultserver", NULL, STRING, "2.3.17" }
/* The backend server name used by default for new mailboxes.  If not
   specified, the server with the most free space will be used for new
   mailboxes. */

{ "deletedprefix", "DELETED", STRING, "2.3.17" }
/*  With \fBdelete_mode\fR set to \fIdelayed\fR, the
    \fBdeletedprefix\fR setting defines the prefix for the hierarchy of
    deleted mailboxes.
.PP
    The hierarchy delimiter will be automatically appended.
*/

{ "delete_mode", "delayed", ENUM("immediate", "delayed"), "2.5.0" }
/*  The manner in which mailboxes are deleted. In the default
    \fIdelayed\fR mode, mailboxes that are being deleted are renamed to
    a special mailbox hierarchy under the \fBdeletedprefix\fR, to be
    removed later by \fBcyr_expire(8)\fR.
.PP
    In \fIimmediate\fR mode, the mailbox is removed from the filesystem
    immediately.
*/

{ "delete_unsubscribe", 0, SWITCH, "3.0.0" }
/* Whether to also unsubscribe from mailboxes when they are deleted.
   Note that this behaviour contravenes RFC 3501 section 6.3.9, but
   may be useful for avoiding user/client software confusion.
   The default is 'no'. */

{ "deleteright", "c", STRING, "2.3.17" }
/* Deprecated - only used for backwards compatibility with existing
   installations.  Lists the old RFC 2086 right which was used to
   grant the user the ability to delete a mailbox.  If a user has this
   right, they will automatically be given the new 'x' right. */

{ "disable_user_namespace", 0, SWITCH, "2.5.0" }
/* Preclude list command on user namespace.  If set to 'yes', the
   LIST response will never include any other user's mailbox.  Admin
   users will always see all mailboxes.  The default is 'no' */

{ "disable_shared_namespace", 0, SWITCH, "2.5.0" }
/* Preclude list command on shared namespace.  If set to 'yes', the
   LIST response will never include any non-user mailboxes.  Admin
   users will always see all mailboxes.  The default is 'no' */

{ "disconnect_on_vanished_mailbox", 0, SWITCH, "2.3.17" }
/* If enabled, IMAP/POP3/NNTP clients will be disconnected by the
   server if the currently selected mailbox is (re)moved by another
   session.  Otherwise, the missing mailbox is treated as empty while
   in use by the client.*/

{ "ischedule_dkim_domain", NULL, STRING, "2.5.0" }
/* The domain to be reported as doing iSchedule DKIM signing. */

{ "ischedule_dkim_key_file", NULL, STRING, "2.5.0" }
/* File containing the private key for iSchedule DKIM signing. */

{ "ischedule_dkim_required", 1, SWITCH, "3.1.4" }
/* A DKIM signature is required on received iSchedule requests. */

{ "ischedule_dkim_selector", NULL, STRING, "2.5.0" }
/* Name of the selector subdividing the domain namespace.  This
   specifies the actual key used for iSchedule DKIM signing within the
   domain. */

{ "duplicate_db", "twoskip", STRINGLIST("skiplist", "sql", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the duplicate delivery suppression
   and sieve. */

{ "duplicate_db_path", NULL, STRING, "2.5.0" }
/* The absolute path to the duplicate db file.  If not specified,
   will be configdirectory/deliver.db */

{ "duplicatesuppression", 1, SWITCH, "2.3.17" }
/* If enabled, lmtpd will suppress delivery of a message to a mailbox if
   a message with the same message-id (or resent-message-id) is recorded
   as having already been delivered to the mailbox.  Records the mailbox
   and message-id/resent-message-id of all successful deliveries. */

{ "event_content_inclusion_mode", "standard", ENUM("standard", "message", "header", "body", "headerbody"), "2.5.0" }
/* The mode in which message content may be included with MessageAppend and
   MessageNew. "standard" mode is the default behavior in which message is
   included up to a size with the notification. In "message" mode, the message
   is included and may be truncated to a size. In "header" mode, it includes
   headers truncated to a size. In "body" mode, it includes body truncated
   to a size. In "headerbody" mode, it includes full headers and body truncated
   to a size */

{ "event_content_size", 0, INT, "2.5.0" }
/* Truncate the message content that may be included with MessageAppend and
   MessageNew. Set 0 to include the entire message itself */

{ "event_exclude_flags", NULL, STRING, "2.5.0" }
/* Don't send event notification for given IMAP flag(s) */

{ "event_exclude_specialuse", "\\Junk", STRING, "2.5.0" }
/* Don't send event notification for folder with given special-use attributes.
   Set ALL for any folder */

{ "event_extra_params", "timestamp", BITFIELD("bodyStructure", "clientAddress", "diskUsed", "flagNames", "messageContent", "messageSize", "messages", "modseq", "service", "timestamp", "uidnext", "vnd.cmu.midset", "vnd.cmu.unseenMessages", "vnd.cmu.envelope", "vnd.cmu.sessionId", "vnd.cmu.mailboxACL", "vnd.cmu.mbtype", "vnd.cmu.davFilename", "vnd.cmu.davUid", "vnd.fastmail.clientId", "vnd.fastmail.sessionId", "vnd.fastmail.convExists", "vnd.fastmail.convUnseen", "vnd.fastmail.cid", "vnd.fastmail.counters", "vnd.cmu.emailid", "vnd.cmu.threadid"), "3.1.6" }
/* Space-separated list of extra parameters to add to any appropriated event. */

{ "event_groups", "message mailbox", BITFIELD("message", "quota", "flags", "access", "mailbox", "subscription", "calendar", "applepushservice" ), "3.0.0" }
/* Space-separated list of groups of related events to turn on notification */

{ "event_notifier", NULL, STRING, "2.5.0" }
/* Notifyd(8) method to use for "EVENT" notifications which are based on
   the RFC 5423.  If not set, "EVENT" notifications are disabled. */

{ "expunge_mode", "delayed", ENUM("immediate", "semidelayed", "delayed"), "3.1.1" }
/* The mode in which messages (and their corresponding cache entries)
   are expunged.  "semidelayed" mode is the old behavior in which the
   message files are purged at the time of the EXPUNGE, but index
   and cache records are retained to facilitate QRESYNC.
   In "delayed" mode, which is the default since Cyrus 2.5.0,
   the message files are also retained, allowing unexpunge to
   rescue them.  In "immediate" mode, both the message files and the
   index records are removed as soon as possible.  In all cases,
   nothing will be finally purged until all other processes have
   closed the mailbox to ensure they never see data disappear under
   them.  In "semidelayed" or "delayed" mode, a later run of "cyr_expire"
   will clean out the retained records (and possibly message files).
   This reduces the amount of I/O that takes place at the time of
   EXPUNGE and should result in greater responsiveness for the client,
   especially when expunging a large number of messages. */

{ "failedloginpause", "3s", DURATION, "3.1.8" }
/* Time to pause after a failed login.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "flushseenstate", 1, SWITCH, "2.5.0", "2.5.0" }
/* Deprecated. No longer used */

{ "foolstupidclients", 0, SWITCH, "2.3.17" }
/* If enabled, only list the personal namespace when a LIST "*" is performed
   (it changes the request to a LIST "INBOX*"). */

{ "force_sasl_client_mech", NULL, STRING, "2.3.17" }
/* Force preference of a given SASL mechanism for client side operations
   (e.g., murder environments).  This is separate from (and overridden by)
   the ability to use the <host shortname>_mechs option to set preferred
   mechanisms for a specific host */

{ "fulldirhash", 0, SWITCH, "2.3.17" }
/* If enabled, uses an improved directory hashing scheme which hashes
   on the entire username instead of using just the first letter as
   the hash.  This changes hash algorithm used for quota and user
   directories and if \fIhashimapspool\fR is enabled, the entire mail
   spool.
.PP
   Note that this option CANNOT be changed on a live system.  The
   server must be quiesced and then the directories moved with the
   \fBrehash\fR utility. */

{ "hashimapspool", 0, SWITCH, "2.3.17" }
/* If enabled, the partitions will also be hashed, in addition to the
   hashing done on configuration directories.  This is recommended if
   one partition has a very bushy mailbox tree. */

{ "debug", 0, SWITCH, "2.5.0" }
/* If enabled, allow syslog() to pass LOG_DEBUG messages. */

# Commented out - there's no such thing as "hostname_mechs", but we need
# this for the man page
# { "hostname_mechs", NULL, STRING, "2.3.17" }
/* Force a particular list of SASL mechanisms to be used when authenticating
   to the backend server hostname (where hostname is the short hostname of
   the server in question). If it is not specified it will query the server
   for available mechanisms and pick one to use. - Cyrus Murder */

# Commented out - there's no such thing as "hostname_password", but we need
# this for the man page
# { "hostname_password", NULL, STRING, "2.3.17" }
/* The password to use for authentication to the backend server hostname
   (where hostname is the short hostname of the server) - Cyrus Murder */

{ "httpallowcompress", 1, SWITCH, "2.5.0" }
/* If enabled, the server will compress response payloads if the client
   indicates that it can accept them.  Note that the compressed data
   will appear in telemetry logs, leaving only the response headers as
   human-readable.*/

{ "httpallowcors", NULL, STRING, "2.5.0" }
/* A wildmat pattern specifying a list of origin URIs ( scheme "://"
   host [ ":" port ] ) that are allowed to make Cross-Origin Resource
   Sharing (CORS) requests on the server.  By default, CORS requests
   are disabled.
.PP
   Note that the scheme and host should both be lowercase, the port
   should be omitted if using the default for the scheme (80 for http,
   443 for https), and there should be no trailing '/' (e.g.:
   "http://www.example.com:8080", "https://example.org"). */

{ "httpallowtrace", 0, SWITCH, "2.5.0" }
/* Allow use of the TRACE method.
.PP
   Note that sensitive data might be disclosed by the response. */

{ "httpallowedurls", NULL, STRING, "2.5.0" }
/* Space-separated list of relative URLs (paths) rooted at
   "httpdocroot" (see below) to be served by httpd.  If set, this
   option will limit served static content to only those paths specified
   (returning "404 Not Found" to any other client requested URLs).
   Otherwise, httpd will serve any content found in "httpdocroot".
.PP
   Note that any path specified by "rss_feedlist_template" is an
   exception to this rule.*/

{ "httpcontentmd5", 0, SWITCH, "2.5.0" }
/* If enabled, HTTP responses will include a Content-MD5 header for
   the purpose of providing an end-to-end message integrity check
   (MIC) of the payload body.  Note that enabling this option will
   use additional CPU to generate the MD5 digest, which may be ignored
   by clients anyways. */

{ "httpdocroot", NULL, STRING, "2.5.0" }
/* If set, http will serve the static content (html/text/jpeg/gif
   files, etc) rooted at this directory.  Otherwise, httpd will not
   serve any static content. */

{ "httpkeepalive", "20s", DURATION, "3.1.8" }
/* Set the length of the HTTP server's keepalive heartbeat.  The
   default is 20 seconds.  The minimum value is 0, which will disable
   the keepalive heartbeat.  When enabled, if a request takes longer
   than \fIhttpkeepalive\fR to process, the server will send the client
   provisional responses every \fIhttpkeepalive\fR until the final
   response can be sent.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "httplogheaders", NULL, STRING, "3.3.1" }
/* Space-separated list of HTTP header fields that will be included
   in the requests logged by httpd(8). */

{ "httpmodules", "", BITFIELD("admin", "caldav", "carddav", "cgi", "domainkey", "freebusy", "ischedule", "jmap", "prometheus", "rss", "tzdist", "webdav"), "3.1.7" }
/* Space-separated list of HTTP modules that will be enabled in
   httpd(8).  This option has no effect on modules that are disabled
   at compile time due to missing dependencies (e.g. libical).
.PP
   Note that "domainkey" depends on "ischedule" being enabled, and
   that both "freebusy" and "ischedule" depend on "caldav" being
   enabled. */

{ "httpprettytelemetry", 0, SWITCH, "2.5.0" }
/* If enabled, HTTP response payloads including server-generated
   markup languages (HTML, XML) will utilize line breaks and
   indentation to promote better human-readability in telemetry logs.
   Note that enabling this option will increase the amount of data
   sent across the wire. */

{ "httptimeout", "5m", DURATION, "3.1.8" }
/* Set the length of the HTTP server's inactivity autologout timer.
   The default is 5 minutes.  The minimum value is 0, which will
   disable persistent connections.
.PP
   For backwards compatibility, if no unit is specified, minutes
   is assumed. */

{ "idlesocket", "{configdirectory}/socket/idle", STRING, "2.3.17" }
/* Unix domain socket that idled listens on. */

{ "ignorereference", 0, SWITCH, "2.3.17" }
/* For backwards compatibility with Cyrus 1.5.10 and earlier -- ignore
  the reference argument in LIST or LSUB commands. */

{ "imapidlepoll", "60s", DURATION, "3.1.8" }
/* The interval for polling for mailbox changes and ALERTs while running
   the IDLE command.  This option is used when idled is not enabled or
   cannot be contacted.  The minimum value is 1 second.  A value of 0
   will disable IDLE.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "imapidresponse", 1, SWITCH, "2.3.17" }
/* If enabled, the server responds to an ID command with a parameter
   list containing: version, vendor, support-url, os, os-version,
   command, arguments, environment.  Otherwise the server returns NIL. */

{ "imapmagicplus", 0, SWITCH, "2.3.17" }
/* Only list a restricted set of mailboxes via IMAP by using
   userid+namespace syntax as the authentication/authorization id.
   Using userid+ (with an empty namespace) will list only subscribed
   mailboxes. */

{ "imipnotifier", NULL, STRING, "3.0.0" }
/* Notifyd(8) method to use for "IMIP" notifications which are based on
   the RFC 6047.  If not set, "IMIP" notifications are disabled. */

{ "implicit_owner_rights", "lkxan", STRING, "3.1.2" }
/* The implicit Access Control List (ACL) for the owner of a mailbox. */

# Commented out - there's no such thing as "@include", but we need
# this for the man page
# { "@include", NULL, STRING, "2.3.17" }
/* Directive which includes the specified file as part of the
   configuration.  If the path to the file is not absolute, CYRUS_PATH
   is prepended. */

{ "improved_mboxlist_sort", 0, SWITCH, "2.3.17" }
/* If enabled, a special comparator will be used which will correctly
   sort mailbox names that contain characters such as ' ' and '-'.
.PP
   Note that this option SHOULD NOT be changed on a live system.  The
   mailboxes database should be dumped (ctl_mboxlist) before the
   option is changed, removed, and then undumped after changing the
   option.  When not using flat files for the subscriptions databases
   the same has to be done (cyr_dbtool) for each subscription database
   See improved_mboxlist_sort.html.*/

{ "jmap_emailsearch_db_path", NULL, STRING, "3.1.6" }
/* The absolute path to the JMAP email search cache file.  If not
   specified, JMAP Email/query and Email/queryChanges will not
   cache email search results. */

{ "jmap_preview_annot", NULL, STRING, "3.1.1" }
/* The name of the per-message annotation, if any, to store message
   previews. */

{ "jmap_imagesize_annot", NULL, STRING, "3.1.1" }
/* The name of the per-message annotation, if any, that stores a
   JSON object, mapping message part numbers of MIME image types
   to an array of their image dimensions. The array must have at
   least two entries, where the first entry denotes the width
   and the second entry the height of the image. Any additional
   values are ignored.

   For example, if message part 1.2 contains an image of width 300
   and height 200, then the value of this annotation would be:

   { "1.2" : [ 300, 200 ] }
   */

{ "jmap_inlinedcids_annot", NULL, STRING, "3.1.1" }
/* The name of the per-message annotation, if any, that stores a
   JSON object, mapping RFC 2392 Content-IDs referenced in HTML bodies
   to the respective HTML body part number.

   For example, if message part 1.2 contains HTML and references an
   inlined image at "cid:foo", then the value of this annotation
   would be:

   { "<foo>" : "1.2" }

   Note that the Content-ID key must be URL-unescaped and enclosed in
   angular brackets, as defined in RFC 2392. */

{ "jmap_preview_length", 64, INT, "3.1.1" }
/* The maximum byte length of dynamically generated message previews. Previews
   stored in jmap_preview_annot take precedence. */

{ "jmap_max_size_upload", 1048576, INT, "3.1.6" }
/* The maximum size (in kilobytes) that the JMAP API accepts
   for blob uploads. Returned as the maxSizeUpload property
   value of the JMAP \"urn:ietf:params:jmap:core\" capabilities object.
   Default is 1Gb. */

{ "jmap_max_size_blob_set", 4096, INT, "3.3.0" }
/* The maximum size (in kilobytes) that the JMAP API accepts
   for Blob/set. Returned as the maxSizeBlobSet property
   value of the JMAP \"https://cyrusimap.org/ns/jmap/blob\" capabilities object.
   Default is 4Mb. */

{ "jmap_max_concurrent_upload", 5, INT, "3.1.6" }
/* The value to return for the maxConcurrentUpload property of
   the JMAP \"urn:ietf:params:jmap:core\" capabilities object. The Cyrus JMAP
   implementation does not enforce this rate-limit. */

{ "jmap_max_size_request", 10240, INT, "3.1.6" }
/* The maximum size (in kilobytes) that the JMAP API accepts
   for requests at the API endpoint. Returned as the
   maxSizeRequest property value of the JMAP \"urn:ietf:params:jmap:core\"
   capabilities object. Default is 10Mb. */

{ "jmap_max_concurrent_requests", 5, INT, "3.1.6" }
/* The value to return for the maxConcurrentRequests property of
   the JMAP \"urn:ietf:params:jmap:core\" capabilities object. The Cyrus JMAP
   implementation does not enforce this rate-limit. */

{ "jmap_max_calls_in_request", 50, INT, "3.1.6" }
/* The maximum number of calls per JMAP request object.
   Returned as the maxCallsInRequest property value of the
   JMAP \"urn:ietf:params:jmap:core\" capabilities object. */

{ "jmap_max_delayed_send", "512d", DURATION, "3.1.8" }
/* The value to return for the maxDelayedSend property of
   the JMAP \"urn:ietf:params:jmap:emailsubmission\" capabilities object.
   The Cyrus JMAP implementation does not enforce this limit.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "jmap_max_objects_in_get", 4096, INT, "3.1.6" }
/* The maximum number of ids that a JMAP client may request in
   a single \"/get\" type method call. The actual number
   of returned objects in the response may exceed this number
   if the JMAP object type supports unbounded \"/get\" calls.
   Returned as the maxObjectsInGet property value of the
   JMAP \"urn:ietf:params:jmap:core\" capabilities object. */

{ "jmap_max_objects_in_set", 4096, INT, "3.1.6" }
/* The maximum number of objects a JMAP client may send to create,
   update or destroy in a single /set type method call.
   Returned as the maxObjectsInSet property value of the
   JMAP \"urn:ietf:params:jmap:core\" capabilities object. */

{ "jmap_mail_max_size_attachments_per_email", 10240, INT, "3.1.6" }
/* The value (in kilobytes) to return for the maxSizeAttachmentsPerEmail
   property of the JMAP \"urn:ietf:params:jmap:mail\" capabilities object. The Cyrus
   JMAP implementation does not enforce this size limit. Default is 10 Mb.*/

{ "jmap_nonstandard_extensions", 0, SWITCH, "3.1.9" }
/* If enabled, support non-standard JMAP extensions.  If not enabled,
   only IETF standard JMAP functionality is supported. */

{ "jmap_set_has_attachment", 1, SWITCH, "3.1.5" }
/* If enabled, the $hasAttachment flag is determined and set for new messages
   created with the JMAP Email/set or Email/import methods. This option should
   typically be enabled, but installations using Cyrus-external message
   annatotors to determine the $hasAttachment flag might want to disable it. */

{ "jmap_vacation", 1, SWITCH, "3.1.8" }
/* If enabled, support the JMAP vacation extension */

{ "jmapuploadfolder", "#jmap", STRING, "3.1.1" }
/* the name of the folder for JMAP uploads (#jmap) */

{ "jmapsubmission_deleteonsend", 1, SWITCH, "3.1.8" }
/* If enabled (the default) then delete the EmailSubmission as soon as the email
 * has been sent */

{ "jmapsubmissionfolder", "#jmapsubmission", STRING, "3.1.8" }
/* the name of the folder for JMAP Submissions (#jmapsubmission) */

{ "jmappushsubscriptionfolder", "#jmappushsubscription", STRING, "3.1.8" }
/* the name of the folder for JMAP Push Subscriptions (#jmappushsubscription) */

{ "iolog", 0, SWITCH, "2.5.0" }
/* Should cyrus output I/O log entries */

{ "ldap_authz", NULL, STRING, "2.3.17" }
/* SASL authorization ID for the LDAP server */

{ "ldap_base", "", STRING, "2.3.17" }
/* Contains the LDAP base dn for the LDAP ptloader module */

{ "ldap_bind_dn", NULL, STRING, "2.3.17" }
/* Bind DN for the connection to the LDAP server (simple bind).
   Do not use for anonymous simple binds */

{ "ldap_deref", "never", STRINGLIST("search", "find", "always", "never"), "2.3.17" }
/* Specify how aliases dereferencing is handled during search. */

{ "ldap_domain_base_dn", "", STRING, "2.5.0" }
/* Base DN to search for domain name spaces. */

{ "ldap_domain_filter", "(&(objectclass=domainrelatedobject)(associateddomain=%s))", STRING, "2.5.0" }
/* Filter to use searching for domains */

{ "ldap_domain_name_attribute", "associateddomain", STRING, "2.5.0" }
/* The attribute name for domains. */

{ "ldap_domain_scope", "sub", STRINGLIST("sub", "one", "base"), "2.5.0" }
/* Search scope */

{ "ldap_domain_result_attribute", "inetdomainbasedn", STRING, "2.5.0" }
/* Result attribute */

{ "ldap_filter", "(uid=%u)", STRING, "2.3.17" }
/* Specify a filter that searches user identifiers.  The following tokens can be
   used in the filter string:

   %%   = %
   %u   = user
   %U   = user portion of %u (%U = test when %u = test@domain.tld)
   %d   = domain portion of %u if available (%d = domain.tld when %u =
          test@domain.tld), otherwise same as %R
   %R   = domain portion of %u starting with @ (%R = @domain.tld
          when %u = test@domain.tld)
   %D   = user dn.  (use when ldap_member_method: filter)
   %1-9 = domain tokens (%1 = tld, %2 = domain when %d = domain.tld)

   ldap_filter is not used when ldap_sasl is enabled. */

{ "ldap_group_base", "", STRING, "2.3.17" }
/* LDAP base dn for ldap_group_filter. */

{ "ldap_group_filter", "(cn=%u)", STRING, "2.3.17" }
/* Specify a filter that searches for group identifiers.
   See ldap_filter for more options. */

{ "ldap_group_scope", "sub", STRINGLIST("sub", "one", "base"), "2.3.17" }
/* Specify search scope for ldap_group_filter. */

{ "ldap_id", NULL, STRING, "2.3.17" }
/* SASL authentication ID for the LDAP server */

{ "ldap_mech", NULL, STRING, "2.3.17" }
/* SASL mechanism for LDAP authentication */

{ "ldap_user_attribute", NULL, STRING, "2.5.0" }
/* Specify LDAP attribute to use as canonical user id */

{ "ldap_member_attribute", NULL, STRING, "2.3.17" }
/* See ldap_member_method. */

{ "ldap_member_base", "", STRING, "2.3.17" }
/* LDAP base dn for ldap_member_filter. */

{ "ldap_member_filter", "(member=%D)", STRING, "2.3.17" }
/* Specify a filter for "ldap_member_method: filter".
   See ldap_filter for more options. */

{ "ldap_member_method", "attribute", STRINGLIST("attribute", "filter"), "2.3.17" }
/* Specify a group method.  The "attribute" method retrieves groups from
   a multi-valued attribute specified in ldap_member_attribute.

   The "filter" method uses a filter, specified by ldap_member_filter, to find
   groups; ldap_member_attribute is a single-value attribute group name. */

{ "ldap_member_scope", "sub", STRINGLIST("sub", "one", "base"), "2.3.17" }
/* Specify search scope for ldap_member_filter. */

{ "ldap_password", NULL, STRING, "2.3.17" }
/* Password for the connection to the LDAP server (SASL and simple bind).
   Do not use for anonymous simple binds */

{ "ldap_realm", NULL, STRING, "2.3.17" }
/* SASL realm for LDAP authentication */

{ "ldap_referrals", 0, SWITCH, "2.3.17" }
/* Specify whether or not the client should follow referrals. */

{ "ldap_restart", 1, SWITCH, "2.3.17" }
/* Specify whether or not LDAP I/O operations are automatically restarted
   if they abort prematurely. */

{ "ldap_sasl", 1, SWITCH, "2.3.17" }
/* Use SASL for LDAP binds in the LDAP PTS module. */

{ "ldap_sasl_authc", NULL, STRING, "2.5.0", "2.5.0", "ldap_id" }
/* Deprecated.  Use ldap_id */

{ "ldap_sasl_authz", NULL, STRING, "2.5.0", "2.5.0", "ldap_authz" }
/* Deprecated.  Use ldap_authz */

{ "ldap_sasl_mech", NULL, STRING, "2.5.0", "2.5.0", "ldap_mech" }
/* Deprecated.  Use ldap_mech */

{ "ldap_sasl_password", NULL, STRING, "2.5.0", "2.5.0", "ldap_password" }
/* Deprecated.  User ldap_password */

{ "ldap_sasl_realm", NULL, STRING, "2.5.0", "2.5.0", "ldap_realm" }
/* Deprecated.  Use ldap_realm */

{ "ldap_scope", "sub", STRINGLIST("sub", "one", "base"), "2.3.17" }
/* Specify search scope. */

{ "ldap_servers", "ldap://localhost/", STRING, "2.5.0", "2.5.0", "ldap_uri" }
/* Deprecated.  Use ldap_uri */

{ "ldap_size_limit", 1, INT, "2.3.17" }
/* Specify a number of entries for a search request to return. */

{ "ldap_start_tls", 0, SWITCH, "2.3.17" }
/* Use transport layer security for ldap:// using STARTTLS. Do not use
   ldaps:// in 'ldap_uri' with this option enabled. */

{ "ldap_time_limit", "5s", DURATION, "3.1.8" }
/* How long to wait for a search request to complete.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "ldap_timeout", "5s", DURATION, "3.1.8" }
/* How long a search can take before timing out.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "ldap_ca_dir", NULL, STRING, "2.5.0" }
/* Path to a directory with CA (Certificate Authority) certificates. */

{ "ldap_ca_file", NULL, STRING, "2.5.0" }
/* Path to a file containing CA (Certificate Authority) certificate(s). */

{ "ldap_ciphers", NULL, STRING, "2.5.0" }
/* List of SSL/TLS ciphers to allow.  The format of the string is
   described in ciphers(1). */

{ "ldap_client_cert", NULL, STRING, "2.5.0" }
/* File containing the client certificate. */

{ "ldap_client_key", NULL, STRING, "2.5.0" }
/* File containing the private client key. */

{ "ldap_verify_peer", 0, SWITCH, "2.5.0" }
/* Require and verify server certificate.  If this option is yes,
   you must specify ldap_ca_file or ldap_ca_dir. */

{ "ldap_tls_cacert_dir", NULL, STRING, "2.5.0", "2.5.0", "ldap_ca_dir" }
/* Deprecated in favor of \fIldap_ca_dir\fR. */

{ "ldap_tls_cacert_file", NULL, STRING, "2.5.0", "2.5.0", "ldap_ca_file" }
/* Deprecated in favor of \fIldap_ca_file\fR. */

{ "ldap_tls_cert", NULL, STRING, "2.5.0", "2.5.0", "ldap_client_cert" }
/* Deprecated in favor of \fIldap_client_cert\fR. */

{ "ldap_tls_key", NULL, STRING, "2.5.0", "2.5.0", "ldap_client_key" }
/* Deprecated in favor of \fIldap_client_key\fR. */

{ "ldap_tls_check_peer", 0, SWITCH, "2.5.0", "2.5.0", "ldap_verify_peer" }
/* Deprecated in favor of \fIldap_verify_peer\fR. */

{ "ldap_tls_ciphers", NULL, STRING, "2.5.0", "2.5.0", "ldap_ciphers" }
/* Deprecated in favor of \fIldap_ciphers\fR. */

{ "ldap_uri", NULL, STRING, "2.3.17" }
/* Contains a list of the URLs of all the LDAP servers when using the
   LDAP PTS module. */

{ "ldap_version", 3, INT, "2.3.17" }
/* Specify the LDAP protocol version.  If ldap_start_tls and/or
   ldap_use_sasl are enabled, ldap_version will be automatically
   set to 3. */

{ "literalminus", 0, SWITCH, "3.0.0" }
/* if enabled, CAPABILITIES will reply with LITERAL- rather than
   LITERAL+ (RFC 7888).  Doesn't actually size-restrict uploads though */

{ "lmtp_downcase_rcpt", 1, SWITCH, "2.5.0" }
/* If enabled, lmtpd will convert the recipient addresses to lowercase
   (up to a '+' character, if present). */

{ "lmtp_exclude_specialuse", "\\Snoozed", STRING, "3.1.8" }
/* Don't allow delivery to folders with given special-use attributes.
.PP
   Note that "snoozing" of emails can currently only be done via the
   JMAP protocol, so delivery directly to the \Snoozed mailbox is
   prohibited by default as it will not be moved back into INBOX
   automatically. */

{ "lmtp_fuzzy_mailbox_match", 0, SWITCH, "2.3.17" }
/* If enabled, and the mailbox specified in the detail part of the
   recipient (everything after the '+') does not exist, lmtpd will try
   to find the closest match (ignoring case, ignoring whitespace,
   falling back to parent) to the specified mailbox name. */

{ "lmtp_over_quota_perm_failure", 0, SWITCH, "2.3.17" }
/* If enabled, lmtpd returns a permanent failure code when a user's
   mailbox is over quota.  By default, the failure is temporary,
   causing the MTA to queue the message and retry later. */

{ "lmtp_preparse", 0, SWITCH, "3.3.1" }
/* If enabled, lmtpd will map in the email and parse the xapian data
   for jmapsearch.  The advantage is that the parsing is done without
   holding any locks.  The disadvantage is that the parsing is done
   even if it winds up not being needed. */

{ "lmtp_strict_quota", 0, SWITCH, "2.3.17" }
/* If enabled, lmtpd returns a failure code when the incoming message
   will cause the user's mailbox to exceed its quota.  By default, the
   failure won't occur until the mailbox is already over quota. */

{ "lmtp_strict_rfc2821", 1, SWITCH, "2.5.0" }
/* By default, lmtpd will be strict (per RFC 2821) with regards to which
   envelope addresses are allowed.  If this option is set to false, 8bit
   characters in the local-part of envelope addresses are changed to 'X'
   instead.  This is useful to avoid generating backscatter with
   certain MTAs like Postfix or Exim which accept such messages. */

{ "lmtpsocket", "{configdirectory}/socket/lmtp", STRING, "2.3.17" }
/* Unix domain socket that lmtpd listens on, used by deliver(8). This should
   match the path specified in cyrus.conf(5). */

{ "lmtptxn_timeout", "5m", DURATION, "3.1.8" }
/* Timeout used during a lmtp transaction to a remote backend (e.g. in a
   murder environment).  Can be used to prevent hung lmtpds on proxy hosts
   when a backend server becomes unresponsive during a lmtp transaction.
   The default is 5 minutes - change to zero for infinite.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "lock_debugtime", NULL, STRING, "3.1.4" }
/* A floating point number of seconds.  If set, time how long we wait for
   any lock, and syslog the filename and time if it's longer than this
   value.  The default of NULL means not to time locks. */

# xxx how does this tie into virtual domains?
{ "loginrealms", "", STRING, "2.3.17" }
/* The list of remote realms whose users may authenticate using cross-realm
   authentication identifiers.  Separate each realm name by a space.  (A
   cross-realm identity is considered any identity returned by SASL
   with an "@" in it.). */

{ "loginuseacl", 0, SWITCH, "2.3.17" }
/* If enabled, any authentication identity which has \fBa\fR rights on a
   user's INBOX may log in as that user. */

{ "logtimestamps", 0, SWITCH, "2.3.17" }
/* Include notations in the protocol telemetry logs indicating the number of
   seconds since the last command or response. */

{ "mailbox_default_options", 0, INT, "2.3.17" }
/* Default "options" field for the mailbox on create.  You'll want to know
   what you're doing before setting this, but it can apply some default
   annotations like duplicate suppression */

{ "mailbox_initial_flags", NULL, STRING, "2.5.0" }
/* space-separated list of permanent flags which will be pre-set in every
   newly created mailbox.  If you know you will require particular
   flag names then this avoids a possible race condition against a client
   that fills the entire 128 available slots.  Default is NULL, which is
   no flags.  Example: $Label1 $Label2 $Label3 NotSpam Spam */

{ "mailbox_maxmessages_addressbook", 0, INT, "3.3.0" }
/* Limit the number of messages that may exist in a single mailbox of
   "addressbook" type. Default (0) means no limit.  This limit applies
   after quotas are checked, so if you have both quota limits and this
   set, then you will be denied if you are either over quota or over
   this per-mailbox count. */

{ "mailbox_maxmessages_calendar", 0, INT, "3.3.0" }
/* Limit the number of messages that may exist in a single mailbox of
   "calendar" type. Default (0) means no limit.  This limit applies
   after quotas are checked, so if you have both quota limits and this
   set, then you will be denied if you are either over quota or over
   this per-mailbox count. */

{ "mailbox_maxmessages_email", 0, INT, "3.3.0" }
/* Limit the number of messages that may exist in a single mailbox of
   "email" (normal) type. Default (0) means no limit.  This limit applies
   after quotas are checked, so if you have both quota limits and this
   set, then you will be denied if you are either over quota or over
   this per-mailbox count. */

{ "mailnotifier", NULL, STRING, "2.3.17" }
/* Notifyd(8) method to use for "MAIL" notifications.  If not set, "MAIL"
   notifications are disabled. */

{ "master_bind_errors_fatal", 0, SWITCH, "3.3.0" }
/* If enabled, failure to bind a port during startup is treated as a fatal
   error, causing master to shut down immediately.  The default is to keep
   running, with the affected service disabled until the next SIGHUP causes
   it to retry.
.PP
   Note that this only applies during startup.  New services that fail to
   come up in response to a reconfig+SIGHUP will just be logged and disabled
   like the default behaviour, without causing master to exit. */

{ "maxheaderlines", 1000, INT, "2.3.17" }
/* Maximum number of lines of header that will be processed into cache
   records.  Default 1000.  If set to zero, it is unlimited.
   If a message hits the limit, an error will be logged and the rest of
   the lines in the header will be skipped.  This is to avoid malformed
   messages causing giant cache records */

{ "maxlogins_per_host", 0, INT, "2.5.0" }
/* Maximum number of logged in sessions allowed per host,
   zero means no limit */

{ "maxlogins_per_user", 0, INT, "2.5.0" }
/* Maximum number of logged in sessions allowed per user,
   zero means no limit */

{ "maxmessagesize", 0, INT, "2.3.17" }
/* Maximum incoming LMTP message size.  If non-zero, lmtpd will reject
   messages larger than \fImaxmessagesize\fR bytes.  If set to 0, this
   will allow messages of any size (the default). */

{ "maxquoted", 131072, INT, "2.3.17" }
/* Maximum size of a single quoted string for the parser.  Default 128k */

{ "maxword", 131072, INT, "2.3.17" }
/* Maximum size of a single word for the parser.  Default 128k */

{ "mboxkey_db", "twoskip", STRINGLIST("skiplist", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for mailbox keys. */

{ "mboxlist_db", "twoskip", STRINGLIST("flat", "skiplist", "sql", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the mailbox list. */

{ "mboxlist_db_path", NULL, STRING, "2.5.0" }
/* The absolute path to the mailboxes db file.  If not specified
   will be configdirectory/mailboxes.db */

{ "mboxname_lockpath", NULL, STRING, "2.4.0" }
/* Path to mailbox name lock files (default $conf/lock) */

{ "metapartition_files", "", BITFIELD("header", "index", "cache", "expunge", "squat", "annotations", "lock", "dav", "archivecache"), "3.0.0" }
/* Space-separated list of metadata files to be stored on a
   \fImetapartition\fR rather than in the mailbox directory on a spool
   partition. */

# Commented out - there's no such thing as "metapartition-name",
# but we need this for the man page
# { "metapartition-name", NULL, STRING, "2.3.17" }
/* The pathname of the metadata partition \fIname\fR, corresponding to
   spool partition \fBpartition-name\fR.  For any mailbox residing in
   a directory on \fBpartition-name\fR, the metadata files listed in
   \fImetapartition_files\fR will be stored in a corresponding directory on
   \fBmetapartition-name\fR.   Note that not every
   \fBpartition-name\fR option is required to have a corresponding
   \fBmetapartition-name\fR option, so that you can selectively choose
   which spool partitions will have separate metadata partitions. */

{ "mupdate_authname", NULL, STRING, "2.3.17" }
/* The SASL username (Authentication Name) to use when authenticating to the
   mupdate server (if needed). */

{ "mupdate_config", "standard", ENUM("standard", "unified", "replicated"), "2.3.17" }
/* The configuration of the mupdate servers in the Cyrus Murder.
   The "standard" config is one in which there are discreet frontend
   (proxy) and backend servers.  The "unified" config is one in which
   a server can be both a frontend and backend.  The "replicated"
   config is one in which multiple backend servers all share the same
   mailspool, but each have their own "replicated" copy of
   mailboxes.db. */

{ "munge8bit", 1, SWITCH, "2.3.17" }
/* If enabled, lmtpd munges messages with 8-bit characters in the
   headers.  The 8-bit characters are changed to `X'.  If
   \fBreject8bit\fR is enabled, setting \fBmunge8bit\fR has no effect.
   (A proper solution to non-ASCII characters in headers is offered by
   RFC 2047 and its predecessors.) */

# xxx badly worded
{ "mupdate_connections_max", 128, INT, "2.3.17" }
/* The max number of connections that a mupdate process will allow, this
   is related to the number of file descriptors in the mupdate process.
   Beyond this number connections will be immediately issued a BYE response. */

{ "mupdate_password", NULL, STRING, "2.3.17" }
/* The SASL password (if needed) to use when authenticating to the
   mupdate server. */

{ "mupdate_port", 3905, INT, "2.3.17" }
/* The port of the mupdate server for the Cyrus Murder */

{ "mupdate_realm", NULL, STRING, "2.3.17" }
/* The SASL realm (if needed) to use when authenticating to the mupdate
   server. */

{ "mupdate_retry_delay", 20, INT, "2.3.17" }
/* The base time to wait between connection retries to the mupdate server. */

{ "mupdate_server", NULL, STRING, "2.3.17" }
/* The mupdate server for the Cyrus Murder */

{ "mupdate_username", "", STRING, "2.3.17" }
/* The SASL username (Authorization Name) to use when authenticating to
   the mupdate server */

{ "mupdate_workers_max", 50, INT, "2.3.17" }
/* The maximum number of mupdate worker threads (overall) */

{ "mupdate_workers_maxspare", 10, INT, "2.3.17" }
/* The maximum number of idle mupdate worker threads */

{ "mupdate_workers_minspare", 2, INT, "2.3.17" }
/* The minimum number of idle mupdate worker threads */

{ "mupdate_workers_start", 5, INT, "2.3.17" }
/* The number of mupdate worker threads to start */

{ "netscapeurl", NULL, STRING, "2.3.17" }
/* If enabled at compile time, this specifies a URL to reply when
   Netscape asks the server where the mail administration HTTP server
   is.  Administrators should set this to a local resource. */

{ "newsaddheaders", "to", BITFIELD("to", "replyto"), "2.5.0" }
/* Space-separated list of headers to be added to incoming usenet
   articles.  Added \fITo:\fR headers will contain email
   delivery addresses corresponding to each newsgroup in the
   \fINewsgroups:\fR header.  Added \fIReply-To:\fR headers will
   contain email delivery addresses corresponding to each newsgroup in
   the \fIFollowup-To:\fR or \fINewsgroups:\fR header.  If the
   specified header(s) already exist in an article, the email
   delivery addresses will be appended to the original header body(s).
.br
.sp
   This option applies if and only if the \fBnewspostuser\fR option is
   set. */

{ "newsgroups", "*", STRING, "2.4.0" }
/* A wildmat pattern specifying which mailbox hierarchies should be
   treated as newsgroups.  Only mailboxes matching the wildmat will
   accept and/or serve articles via NNTP.  If not set, a default
   wildmat of "*" (ALL shared mailboxes) will be used.  If the
   \fInewsprefix\fR option is also set, the default wildmat will be
   translated to "<newsprefix>.*" */

{ "newsmaster", "news", STRING, "2.3.17" }
/* Userid that is used for checking access controls when executing
   Usenet control messages.  For instance, to allow articles to be
   automatically deleted by cancel messages, give the "news" user
   the 'd' right on the desired mailboxes.  To allow newsgroups to be
   automatically created, deleted and renamed by the corresponding
   control messages, give the "news" user the 'c' right on the desired
   mailbox hierarchies. */

{ "newspeer", NULL, STRING, "2.3.17" }
/* A list of whitespace-separated news server specifications to which
   articles should be fed.  Each server specification is a string of
   the form [user[:pass]@]host[:port][/wildmat] where 'host' is the fully
   qualified hostname of the server, 'port' is the port on which the
   server is listening, 'user' and 'pass' are the authentication
   credentials and 'wildmat' is a pattern that specifies which groups
   should be fed.  If no 'port' is specified, port 119 is used.  If
   no 'wildmat' is specified, all groups are fed.  If 'user' is specified
   (even if empty), then the NNTP POST command will be used to feed
   the article to the server, otherwise the IHAVE command will be
   used.
.br
.sp
   A '@' may be used in place of '!' in the wildmat to prevent feeding
   articles cross-posted to the given group, otherwise cross-posted
   articles are fed if any part of the wildmat matches.  For example,
   the string "peer.example.com:*,!control.*,@local.*" would feed all
   groups except control messages and local groups to
   peer.example.com.  In the case of cross-posting to local groups,
   these articles would not be fed. */

{ "newspostuser", NULL, STRING, "2.5.0" }
/* Userid used to deliver usenet articles to newsgroup folders
   (usually via lmtp2nntp).  For example, if set to "post", email sent
   to "post+comp.mail.imap" would be delivered to the "comp.mail.imap"
   folder.
.br
.sp
   When set, the Cyrus NNTP server will add the header(s) specified in
   the \fBnewsaddheaders\fR option to each incoming usenet article.
   The added header(s) will contain email delivery addresses
   corresponding to each relevant newsgroup.  If not set, no headers
   are added to usenet articles. */

{ "newsprefix", NULL, STRING, "2.3.17" }
/* Prefix to be prepended to newsgroup names to make the corresponding
   IMAP mailbox names. */

{ "newsrc_db_path", NULL, STRING, "2.5.0" }
/* The absolute path to the newsrc db file.  If not specified,
   will be configdirectory/fetchnews.db */

{ "nntptimeout", "3m", DURATION, "3.1.8" }
/* Set the length of the NNTP server's inactivity autologout timer.
   The minimum value is 3 minutes, also the default.
.PP
   For backward compatibility, if no unit is specified, minutes is
   assumed. */

{ "notesmailbox", NULL, STRING, "3.0.0" }
/* The top level mailbox in each user's account which is used to store
 * Apple-style Notes.  Default is blank (disabled) */

{ "notifysocket", "{configdirectory}/socket/notify", STRING, "2.3.17" }
/* Unix domain socket that the mail notification daemon listens on. */

{ "notify_external", NULL, STRING, "2.4.0" }
/* Path to the external program that notifyd(8) will call to send mail
   notifications.
.PP
The external program will be called with the following
command line options:

.TP
.BI \-c " class"
.\"
.TP
.BI \-p " priority"
.\"
.TP
.BI \-u " user"
.\"
.TP
.BI \-m " mailbox"
.PP
And the notification message will be available on \fIstdin\fR.
*/

# Commented out - there's no such thing as "partition-name", but we need
# this for the man page
# { "partition-name", NULL, STRING, "2.3.17" }
/* The pathname of the partition \fIname\fR.  At least one partition
   pathname MUST be specified.  If the \fBdefaultpartition\fR option is
   used, then its pathname MUST be specified.  For example, if the
   value of the \fBdefaultpartion\fR option is \fBpart1\fR, then the
   \fBpartition-part1\fR field is required. */

{ "partition_select_mode", "freespace-most", STRINGLIST("random", "freespace-most", "freespace-percent-most", "freespace-percent-weighted", "freespace-percent-weighted-delta"), "2.5.0" }
/* Partition selection mode.
.PP
.IP \fIrandom\fR 5
(pseudo-)random selection
.\"
.IP \fIfreespace-most\fR 5
partition with the most free space (KiB)
.\"
.IP \fIfreespace-percent-most\fR 5
partition with the most free space (%)
.\"
.IP \fIfreespace-percent-weighted\fR 5
each partition is weighted according to its free space (%); the more free space
the partition has, the more chances it has to be selected
.\"
.IP \fIfreespace-percent-weighted-delta\fR 5
each partition is weighted according to its difference of free space (%)
compared to the most used partition; the more the partition is lagging behind
the most used partition, the more chances it has to be selected
.PP
Note that actually even the most used partition has a few chances to be
selected, and those chances increase when other partitions get closer
 */

{ "partition_select_exclude", NULL, STRING, "2.5.0" }
/* List of partitions to exclude from selection mode. */

{ "partition_select_usage_reinit", 0, INT, "2.5.0" }
/* For a given session, number of \fBoperations\fR (e.g. partition selection)
   for which partitions usage data are cached. */

{ "partition_select_soft_usage_limit", 0, INT, "2.5.0" }
/* Limit of partition usage (%): if a partition is over that limit, it is
   automatically excluded from selection mode.
.PP
If all partitions are over that limit, this feature is not used anymore.
 */

{ "plaintextloginpause", NULL, DURATION, "3.1.8" }
/* Time to pause after a successful plaintext login.  For systems that
   support strong authentication, this permits users to perceive a cost
   of using plaintext passwords.  (This does not affect the use of PLAIN
   in SASL authentications.)
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "plaintextloginalert", NULL, STRING, "2.3.17" }
/* Message to send to client after a successful plaintext login. */

{ "popexpiretime", "-1", DURATION, "3.1.8" }
/* The duration advertised as being the minimum a message may be
   left on the POP server before it is deleted (via the CAPA command,
   defined in the POP3 Extension Mechanism, which some clients may
   support).  This duration has a granularity of whole days, with partial
   days truncated (so e.g. "45m" is effectively "0d").  "NEVER", the
   default, may be specified with a negative number.
.PP
   The Cyrus POP3 server never deletes mail, no matter what the value of
   this parameter is.  However, if a site implements a less liberal policy,
   it needs to change this parameter accordingly.
.PP
   For backward compatibility, if no unit is specified, days is
   assumed. */

{ "popminpoll", NULL, DURATION, "3.1.8" }
/* Set the minimum amount of time the server forces users to wait
   between successive POP logins.
.PP
   For backward compatibility, if no unit is specified, minutes is
   assumed. */

{ "popsubfolders", 0, SWITCH, "2.3.17" }
/* Allow access to subfolders of INBOX via POP3 by using
   userid+subfolder syntax as the authentication/authorization id. */

{ "poppollpadding", 1, INT, "2.3.17" }
/* Create a softer minimum poll restriction.  Allows \fIpoppollpadding\fR
   connections before the minpoll restriction is triggered.  Additionally,
   one padding entry is recovered every \fIpopminpoll\fR minutes.
   This allows for the occasional polling rate faster than popminpoll,
   (i.e., for clients that require a send/receive to send mail) but still
   enforces the rate long-term.  Default is 1 (disabled).
.br
.sp
   The easiest way to think of it is a queue of past connections, with one
   slot being filled for every connection, and one slot being cleared
   every \fIpopminpoll\fR minutes. When the queue is full, the user
   will not be able to check mail again until a slot is cleared.  If the
   user waits a sufficient amount of time, they will get back many or all
   of the slots. */

{ "poptimeout", "10m", DURATION, "3.1.8" }
/* Set the length of the POP server's inactivity autologout timer.
   The minimum value is 10 minutes, the default.
.PP
   For backward compatibility, if no unit is specified, minutes is
   assumed. */

{ "popuseacl", 0, SWITCH, "2.3.17" }
/* Enforce IMAP ACLs in the pop server.  Due to the nature of the POP3
   protocol, the only rights which are used by the pop server are 'r',
   't', and 's' for the owner of the mailbox.  The 'r' right allows the
   user to open the mailbox and list/retrieve messages.  The 't' right
   allows the user to delete messages.  The 's' right allows messages
   retrieved by the user to have the \\Seen flag set (only if
   \fIpopuseimapflags\fR is also enabled). */

{ "popuseimapflags", 0, SWITCH, "2.3.17" }
/* If enabled, the pop server will set and obey IMAP flags.  Messages
   having the \\Deleted flag are ignored as if they do not exist.
   Messages that are retrieved by the client will have the \\Seen flag
   set.  All messages will have the \\Recent flag unset. */

{ "postmaster", "postmaster", STRING, "2.3.17" }
/* Username that is used as the 'From' address in rejection MDNs produced
   by sieve. */

{ "postspec", NULL, STRING, "2.3.17" }

{ "postuser", "", STRING, "2.3.17" }
/* Userid used to deliver messages to shared folders.  For example, if
   set to "bb", email sent to "bb+shared.blah" would be delivered to
   the "shared.blah" folder.  By default, an email address of
   "+shared.blah" would be used. */

{ "proc_path", NULL, STRING, "2.5.0" }
/* Path to proc directory.  Default is NULL - must be an absolute path
   if specified.  If not specified, the path $configdirectory/proc/ will be
   used. */

{ "prometheus_enabled", 0, SWITCH, "3.1.2" }
/* Whether tracking of service metrics for Prometheus is enabled. */

{ "prometheus_need_auth", "admin", STRINGLIST("none", "user", "admin"), "3.1.2" }
/* Authentication level required to fetch Prometheus metrics. */

{ "prometheus_update_freq", "10s", DURATION, "3.1.8" }
/* Frequency in at which promstatsd should re-collate its statistics
   report.  The minimum value is 1 second, the default is 10 seconds.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */
   */

{ "prometheus_stats_dir", NULL, STRING, "3.1.2" }
/* Directory to use for gathering prometheus statistics.  If specified,
   must be an absolute path.  If not specified, the default path
   $configdirectory/stats/ will be used.  It may be advantageous to locate this
   directory on ephemeral storage. */

{ "proxy_authname", "proxy", STRING, "2.3.17" }
/* The authentication name to use when authenticating to a backend server
   in the Cyrus Murder. */

{ "proxy_compress", 0, SWITCH, "2.3.17" }
/* Try to enable protocol-specific compression when performing a client
   connection to a backend server in the Cyrus Murder.
.PP
  Note that this should only be necessary over slow network
  connections.  Also note that currently only IMAP and MUPDATE support
  compression. */

{ "proxy_password", NULL, STRING, "2.3.17" }
/* The default password to use when authenticating to a backend server
   in the Cyrus Murder.  May be overridden on a host-specific basis using
   the hostname_password option. */

{ "proxy_realm", NULL, STRING, "2.3.17" }
/* The authentication realm to use when authenticating to a backend server
   in the Cyrus Murder */

{ "proxyd_allow_status_referral", 0, SWITCH, "2.3.17" }
/* Set to true to allow proxyd to issue referrals to clients that support it
   when answering the STATUS command.  This is disabled by default since
   some clients issue many STATUS commands in a row, and do not cache the
   connections that these referrals would cause, thus resulting in a higher
   authentication load on the respective backend server. */

{ "proxyd_disable_mailbox_referrals", 0, SWITCH, "2.3.17" }
/* Set to true to disable the use of mailbox-referrals on the
   proxy servers. */

{ "proxyservers", NULL, STRING, "2.3.17" }
/* A list of users and groups that are allowed to proxy for other
   users, separated by spaces.  Any user listed in this will be
   allowed to login for any other user: use with caution.
   In a standard murder this option should ONLY be set on backends.
   DO NOT SET on frontends or things won't work properly. */

{ "pts_module", "afskrb", STRINGLIST("afskrb", "ldap"), "2.3.17" }
/* The PTS module to use. */

{ "ptloader_sock", NULL, STRING, "2.3.17" }
/* Unix domain socket that ptloader listens on.
   (defaults to configdirectory/ptclient/ptsock) */

{ "ptscache_db", "twoskip", STRINGLIST("skiplist", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the pts cache. */

{ "ptscache_db_path", NULL, STRING, "2.5.0" }
/* The absolute path to the ptscache db file.  If not specified,
   will be configdirectory/ptscache.db */

{ "ptscache_timeout", "3h", DURATION, "3.1.8" }
/* The timeout for the PTS cache database when using the auth_krb_pts
   authorization method (default: 3 hours).
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "ptskrb5_convert524", 1, SWITCH, "2.3.16" }
/* When using the AFSKRB ptloader module with Kerberos 5 canonicalization,
   do the final 524 conversion to get a n AFS style name (using '.' instead
   of '/', and using short names */

{ "ptskrb5_strip_default_realm", 1, SWITCH, "2.3.17" }
/* When using the AFSKRB ptloader module with Kerberos 5 canonicalization,
   strip the default realm from the userid (this does not affect the stripping
   of realms specified by the afspts_localrealms option) */

{ "qosmarking", "cs0", ENUM("cs0", "cs1", "cs2", "cs3", "cs4", "cs5", "cs6", "cs7", "af11", "af12", "af13", "af21", "af22", "af23", "af31", "af32", "af33", "af41", "af42", "af43", "ef"), "2.5.0" }
/* This specifies the Class Selector or Differentiated Services Code Point
   designation on IP headers (in the ToS field). */

{ "quota_db", "quotalegacy", STRINGLIST("flat", "skiplist", "sql", "quotalegacy", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for quotas. */

{ "quota_db_path", NULL, STRING, "2.5.0" }
/* The absolute path for the quota database (if you choose a single-file
   quota DB type - or the base path if you choose quotalegacy).  If
   not specified will be configdirectory/quotas.db or configdirectory/quota/ */

{ "quota_use_conversations", 0, SWITCH, "3.3.0" }
/* If conversations it enabled and quotaroot is a user folder, use the
   conversations quota counts, which count multiple copies of exactly the
   same message (by GUID) as only one */

{ "quotawarn", 90, INT, "2.3.17" }
/* The percent of quota utilization over which the server generates
   warnings. */

{ "quotawarnkb", 0, INT, "2.3.17" }
/* The maximum amount of free space (in kB) at which to give a quota
   warning (if this value is 0, or if the quota is smaller than this
   amount, then warnings are always given). */

{ "quotawarnmsg", 0, INT, "2.5.0" }
/* The maximum amount of messages at which to give a quota warning
   (if this value is 0, or if the quota is smaller than this
   amount, then warnings are always given). */

{ "readonly", 0, SWITCH, "3.3.0" }
/* If enabled, all IMAP, POP and JMAP connections are read-only,
 * no writes allowed */

{ "reject8bit", 0, SWITCH, "2.3.17" }
/* If enabled, lmtpd rejects messages with 8-bit characters in the
   headers. */

{ "restore_authname", NULL, STRING, "3.0.0" }
/* The authentication used by the restore tool when authenticating
   to an IMAP/sync server. */

{ "restore_password", NULL, STRING, "3.0.0" }
/* The password used by the restore tool when authenticating to an
   IMAP/sync server. */

{ "restore_realm", NULL, STRING, "3.0.0" }
/* The authentication realm used by the restore tool when
   authenticating to an IMAP/sync server. */

{ "reverseacls", 0, SWITCH, "3.0.0" }
/* At startup time, ctl_cyrusdb -r will check this value and it
   will either add or remove reverse ACL pointers from mailboxes.db */

{ "reverseuniqueids", 1, SWITCH, "3.3.0" }
/* At startup time, ctl_cyrusdb -r will check this value and it
   will either add or remove reverse UNIQUEID pointers from mailboxes.db */

{ "rfc2046_strict", 0, SWITCH, "2.3.17" }
/* If enabled, imapd will be strict (per RFC 2046) when matching MIME
   boundary strings.  This means that boundaries containing other
   boundaries as substrings will be treated as identical.  Since
   enabling this option will break some messages created by Eudora 5.1
   (and earlier), it is recommended that it be left disabled unless
   there is good reason to do otherwise. */

{ "rfc2047_utf8", 0, SWITCH, "3.0.0" }
/* If enabled, imapd will parse any non-encoded character sequence in
   MIME header values as UTF8. This is useful for installations that
   either advertise the UTF8SMTP (RFC 5335) extension or receive mails
   with improperly escaped UTF-8 byte sequences. It is recommended that
   this option is left disabled unless there is good reason to do
   otherwise. */

{ "rfc3028_strict", 1, SWITCH, "2.3.17" }
/* If enabled, Sieve will be strict (per RFC 3028) with regards to
   which headers are allowed to be used in address and envelope tests.
   This means that only those headers which are defined to contain addresses
   will be allowed in address tests and only "to" and "from" will be
   allowed in envelope tests.  When disabled, ANY grammatically correct header
   will be allowed. */

{ "rss_feedlist_template", NULL, STRING, "2.5.0" }
/* File containing HTML that will be used as a template for displaying
   the list of available RSS feeds.  A single instance of the variable
   %RSS_FEEDLIST% should appear in the file, which will be replaced by
   a nested unordered list of feeds.  The toplevel unordered list will
   be tagged with an id of "feed" (<ul id='feed'>) which can be used
   by stylesheet(s) in your template.  The dynamically created list of
   feeds based on the HTML template will be accessible at the "/rss"
   URL on the server. */

{ "rss_feeds", "*", STRING, "2.5.0" }
/* A wildmat pattern specifying which mailbox hierarchies should be
   treated as RSS feeds.  Only mailboxes matching the wildmat will
   have their messages available via RSS.  If not set, a default
   wildmat of "*" (ALL mailboxes) will be used. */

{ "rss_maxage", NULL, DURATION, "3.1.8" }
/* Maximum age of items to display in an RSS channel.  If non-zero,
   httpd will only display items received within this time period.
   If set to 0, all available items will be displayed (the default).
.PP
   For backward compatibility, if no unit is specified, days is
   assumed. */

{ "rss_maxitems", 0, INT, "2.5.0" }
/* Maximum number of items to display in an RSS channel.  If non-zero,
   httpd will display no more than the \fIrss_maxitems\fR most recent
   items.  If set to 0, all available items will be displayed (the
   default). */

{ "rss_maxsynopsis", 0, INT, "2.5.0" }
/* Maximum RSS item synopsis length.  If non-zero, httpd will display
   no more than the first \fIrss_maxsynopsis\fR characters of an
   item's synopsis.  If set to 0, the entire synopsis will be
   displayed (the default). */

{ "rss_realm", NULL, STRING, "2.5.0" }
/* The realm to present for HTTP authentication of RSS feeds.  If not
   set (the default), the value of the "servername" option will be
   used.*/

# Commented out - used by libsasl
# { "sasl_auto_transition", 0, SWITCH, "2.3.17" }
/* If enabled, the SASL library will automatically create authentication
   secrets when given a plaintext password.  See the SASL documentation. */

{ "sasl_maximum_layer", 256, INT, "2.3.17" }
/* Maximum SSF (security strength factor) that the server will allow a
   client to negotiate. */

{ "sasl_minimum_layer", 0, INT, "2.3.17" }
/* The minimum SSF that the server will allow a client to negotiate.
   A value of 1 requires integrity protection; any higher value
   requires some amount of encryption. */

# Commented out - used by libsasl
# { "sasl_option", 0, STRING, "2.3.17" }
/* Any SASL option can be set by preceding it with \fBsasl_\fR.  This
   file overrides the SASL configuration file. */

# Commented out - used by libsasl
# { "sasl_pwcheck_method", NULL, STRING, "2.3.17" }
/* The mechanism used by the server to verify plaintext passwords.
   Possible values include "auxprop", "saslauthd", and "pwcheck". */

{ "search_batchsize", 20, INT, "3.0.0" }
/* The number of messages to be indexed in one batch (default 20).
   Note that long batches may delay user commands or mail delivery. */

{ "search_attachment_extractor_url", NULL, STRING, "3.3.1" }
/* A HTTP or HTTPS URL to extract search text from rich text attachments
   and other media during search indexing. The server at this URL must
   implement the following protocol:

   1. For each attachment of an email, Cyrus sends a GET request to the
   URL <extractor-url>/<cyrus-id>, where <extractor-url> is the
   configured URL and <cyrus-id> is a Cyrus-chosen path segment that
   uniquely identifies this attachment.

   2. If the extractor already has a cached plain text extract of the
   attachment identified by <cyrus-id> then it may return HTTP status
   code 200 (OK) and the plain text extract with a Content-Type
   "text/plain" header. Otherwise it must return HTTP status 404 (Not Found).

   3. If Cyrus receives the HTTP status code 404 (Not Found), then it sends
   a PUT request to the same URL as previously. The PUT request body
   contains the decoded, binary body of the attachment. The Content-Type
   request header has the same value as declared in the MIME part
   headers, including any type parameters.

   4. The extractor must return the plain text extract with either HTTP status
   200 (OK) or 201 (Created) and a Content-Type "text/plain" header.
   If no text can be extracted, then the extractor may return any return code
   in the range 4xx, or 200 and an empty response body.

   Any other HTTP status code is treated as an error. For performance
   reasons, the Cyrus indexer attempts to keep-alive the TCP connection
   to the extractor.
   Xapian only.
 */

{ "search_index_language", 0, SWITCH, "3.3.1" }
/*
  If enabled, then messages bodies are stemmed by detected language
  in addition to the default English stemmer.
  Xapian only.
 */

{ "search_index_parts", 0, SWITCH, "3.2.1", "3.2.1" }
/*
  Deprecated. No longer used.
 */

{ "search_index_skip_domains", NULL, STRING, "3.3.1" }
/*
 A space separated list of domains - if set, any users in the listed domains
 will be skipped when indexing.
 */

{ "search_index_skip_users", NULL, STRING, "3.3.1" }
/*
 A space separated list of usernames - if set, any users in the list
 will be skipped when indexing.
 */

{ "search_query_language", 0, SWITCH, "3.3.0", "3.3.0" }
/*
  Deprecated. No longer used.
 */

{ "search_normalisation_max", 1000, INT, "3.0.0" }
/* A resource bound for the combinatorial explosion of search expression
   tree complexity caused by normalising expressions with many OR nodes.
   These can use more CPU time to optimise than they save IO time in scanning
   folders. */

{ "search_engine", "none", ENUM("none", "squat", "xapian"), "3.1.2" }
/* The indexing engine used to speed up searching.  */

{ "search_fuzzy_always", 0, SWITCH, "3.1.5" }
/* Whether to enable RFC 6203 FUZZY search for all IMAP SEARCH. If turned
   on, search attributes will be searched using FUZZY search by default.
   If turned off, clients have to explicitly use the FUZZY search key to
   enable fuzzy search for regular SEARCH commands. */

{ "search_index_headers", 1, SWITCH, "3.0.0" }
/* Whether to index headers other than From, To, Cc, Bcc, and Subject.
   Experiment shows that some headers such as Received and DKIM-Signature
   can contribute up to 2/3rds of the index size but almost nothing to
   the utility of searching.  Note that if header indexing is disabled,
   headers can still be searched, the searches will just be slower.
 */

{ "search_indexed_db", "twoskip", STRINGLIST("flat", "skiplist", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the search latest indexed uid state.  Xapian only. */

{ "search_maxtime", NULL, STRING, "3.0.0" }
/* The maximum number of seconds to run a search for before aborting.  Default
   of no value means search "forever" until other timeouts. */

{ "search_queryscan", 5000, INT, "3.1.7" }
/* The minimum number of records require to do a direct scan of all G keys
 * rather than indexed lookups.  A value of 0 means always do indexed lookups.
 */

{ "search_skipdiacrit", 1, SWITCH, "2.5.0" }
/* When searching, should diacriticals be stripped from the search
   terms.  The default is "true", a search for "hav" will match
   "Håvard".  This is not RFC 5051 compliant, but it backwards
   compatible, and may be preferred by some sites. */

{ "search_skiphtml", 0, SWITCH, "3.0.0" }
/* If enabled, HTML parts of messages are skipped, i.e. not indexed and
   not searchable.  Otherwise, they're indexed.  */

{ "search_whitespace", "merge", ENUM("skip", "merge", "keep"), "2.5.0" }
/* When searching, how whitespace should be handled.  Options are:
   "skip" (default in 2.3 and earlier series) - where a search for
   "equi" would match "the quick brown fox".  "merge" - the default,
   where "he  qu" would match "the quick   brownfox", and "keep",
   where whitespace must match exactly.  The default of "merge" is
   recommended for most cases - it's a good compromise which
   keeps words separate. */

{ "search_snippet_length", 255, INT, "3.0.0" }
/* The maximum byte length of a snippet generated by the XSNIPPETS
   command. Only supported by the Xapian search backend, which
   attempts to always fill search_snippet_length bytes in the
   generated snippet. */

{ "search_stopword_path", NULL, STRING, "3.1.7" }
/* The absolute base path to the search stopword lists. If not specified,
   no stopwords will be taken into account during search indexing. Currently,
   the only supported and default stop word file is english.txt. */

# Commented out - there's no such thing as "searchpartition-name",
# but we need this for the man page
# { "searchpartition-name", NULL, STRING, "3.1.4" }
/* The pathname where to store the xapian search indexes of \fIsearchtier\fR
   for mailboxes of partition \fIname\fR. This must be configured for the
   \fIdefaultsearchtier\fR and any additional search tier (see squatter for
   details).
.PP
   For example: if \fIdefaultpartition\fR is defined as part1 and
   \fIdefaultsearchtier\fR as tier1 then the configuration must contain
   an entry \fItier1searchpartition-part1\fR that defines the path where to
   store this tier1's search index for the part1 partition.
.PP
   This option MUST be specified for xapian search. */

{ "seenstate_db", "twoskip", STRINGLIST("flat", "skiplist", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the seen state. */

{ "sendmail", "/usr/sbin/sendmail", STRING, "2.3.17" }
/* The pathname of the sendmail executable.  Sieve invokes sendmail
   for sending rejections, redirects and vacation responses. */

{ "sendmail_auth_id", "CYRUS_SENDMAIL_AUTH_ID", STRING, "3.1.3" }
/* The name of an environment variable to set when invoking sendmail.
   The value of this environment variable will contain the user id
   of the currently authenticated user. If no user is authenticated
   the environment variable is not set. */

{ "serverlist", NULL, STRING, "2.3.17" }
/* Whitespace separated list of backend server names.  Used for
   finding server with the most available free space for proxying
   CREATE. */

{ "serverlist_select_mode", "freespace-most", STRINGLIST("random", "freespace-most", "freespace-percent-most", "freespace-percent-weighted", "freespace-percent-weighted-delta"), "2.5.0" }
/* Server selection mode.
.PP
.IP \fIrandom\fR 5
(pseudo-)random selection
.\"
.IP \fIfreespace-most\fR 5
backend with the most (total) free space (KiB)
.\"
.IP \fIfreespace-percent-most\fR 5
backend whose partition has the most free space (%)
.\"
.IP \fIfreespace-percent-weighted\fR 5
same as for partition selection, comparing the free space (%) of the least used
partition of each backend
.\"
.IP \fIfreespace-percent-weighted-delta\fR 5
same as for partition selection, comparing the free space (%) of the least used
partition of each backend.
.PP
 */

{ "serverlist_select_usage_reinit", 0, INT, "2.5.0" }
/* For a given session, number of \fBoperations\fR (e.g. backend selection)
   for which backend usage data are cached. */

{ "serverlist_select_soft_usage_limit", 0, INT, "2.5.0" }
/* Limit of backend usage (%): if a backend is over that limit, it is
   automatically excluded from selection mode.
.PP
If all backends are over that limit, this feature is not used anymore.
 */

{ "servername", NULL, STRING, "2.3.17" }
/* This is the hostname visible in the greeting messages of the POP,
   IMAP and LMTP daemons. If it is unset, then the result returned
   from gethostname(2) is used.  This is also the value used by murder
   clusters to identify the host name.  It should be resolvable by
   DNS to the correct host, and unique within an active cluster.  If
   you are using low level replication (e.g. drbd) then it should be
   the same on each copy and the DNS name should also be moved to
   the new master on failover. */

{ "serverinfo", "on", ENUM("off", "min", "on"), "2.3.17" }
/* The server information to display in the greeting and capability
   responses. Information is displayed as follows:

.IP
   "off" = no server information in the greeting or capabilities
.br
   "min" = \fIservername\fR in the greeting; no server information in the capabilities
.br
   "on" = \fIservername\fR and product version in the greeting;
product version in the capabilities
.PP
*/

{ "sharedprefix", "Shared Folders", STRING, "2.3.17" }
/* If using the alternate IMAP namespace, the prefix for the shared
   namespace.  The hierarchy delimiter will be automatically appended.
*/

{ "sieve_allowreferrals", 1, SWITCH, "2.3.17" }
/* If enabled, timsieved will issue referrals to clients when the
   user's scripts reside on a remote server (in a Murder).
   Otherwise, timsieved will proxy traffic to the remote server. */

{ "sieve_duplicate_max_expiration", "90d", DURATION, "3.1.8" }
/* Maximum expiration time for duplicate message tracking records.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */
*/

{ "sieve_extensions", "fileinto reject vacation vacation-seconds notify include envelope environment body relational regex subaddress copy date index imap4flags mailbox mboxmetadata servermetadata variables editheader extlists duplicate ihave fcc special-use redirect-dsn redirect-deliverby mailboxid vnd.cyrus.log vnd.cyrus.jmapquery snooze", BITFIELD("fileinto", "reject", "vacation", "vacation-seconds", "notify", "include", "envelope", "environment", "body", "relational", "regex", "subaddress", "copy", "date", "index", "imap4flags=imapflags", "mailbox", "mboxmetadata", "servermetadata", "variables", "editheader", "extlists", "duplicate", "ihave", "fcc", "special-use", "redirect-dsn", "redirect-deliverby", "mailboxid", "vnd.cyrus.log=x-cyrus-log", "vnd.cyrus.jmapquery=x-cyrus-jmapquery", "snooze=vnd.cyrus.snooze=x-cyrus-snooze"), "3.3.1" }
/* Space-separated list of Sieve extensions allowed to be used in
   sieve scripts, enforced at submission by timsieved(8).  Any
   previously installed script will be unaffected by this option and
   will continue to execute regardless of the extensions used.  This
   option has no effect on options that are disabled at compile time
   (e.g., "regex"). */

{ "sieve_maxscriptsize", 32, INT, "2.3.17" }
/* Maximum size (in kilobytes) any sieve script can be, enforced at
   submission by timsieved(8). */

{ "sieve_maxscripts", 5, INT, "2.3.17" }
/* Maximum number of sieve scripts any user may have, enforced at
   submission by timsieved(8). */

{ "sieve_utf8fileinto", 0, SWITCH, "2.3.17" }
/* If enabled, the sieve engine expects folder names for the
   \fIfileinto\fR action in scripts to use UTF8 encoding.  Otherwise,
   modified UTF7 encoding should be used. */

{ "sieve_sasl_send_unsolicited_capability", 0, SWITCH, "2.3.17" }
/* If enabled, timsieved will emit a capability response after a successful
   SASL authentication, per draft-martin-managesieve-12.txt . */

{ "sieve_use_lmtp_reject", 1, SWITCH, "3.1.1" }
/* Enabled by default.  If reject can be done via LMTP, then return a 550
   rather than generating the bounce message in Cyrus. */

{ "sieve_vacation_min_response", "3d", DURATION, "3.1.8" }
/* Minimum time interval between consecutive vacation responses, per
   draft-ietf-vacation-seconds.txt.  The default is 3 days.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "sieve_vacation_max_response", "90d", DURATION, "3.1.8" }
/* Maximum time interval between consecutive vacation responses, per
   draft-ietf-vacation-seconds.txt.  The default is 90 days.  The
   minimum is 7 days.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "sievedir", "/var/imap/sieve", STRING, "2.3.17" }
/* If sieveusehomedir is false, this directory is searched for Sieve
   scripts. */

{ "sievenotifier", NULL, STRING, "2.3.17" }
/* Notifyd(8) method to use for "SIEVE" notifications.  If not set, "SIEVE"
   notifications are disabled.
.PP
   This method is only used when no method is specified in the script. */

{ "sieveusehomedir", 0, SWITCH, "2.3.17" }
/* If enabled, lmtpd will look for Sieve scripts in user's home
   directories: ~user/.sieve. */

{ "anysievefolder", 0, SWITCH, "2.5.0" }
/* It must be "yes" in order to permit the autocreation of any INBOX subfolder
   requested by a sieve filter, through the "fileinto" action. (default = no) */

{ "singleinstancestore", 1, SWITCH, "2.3.17" }
/* If enabled, imapd, lmtpd and nntpd attempt to only write one copy
   of a message per partition and create hard links, resulting in a
   potentially large disk savings. */

{ "skiplist_always_checkpoint", 1, SWITCH, "2.3.17" }
/* If enabled, this option forces the skiplist cyrusdb backend to
   always checkpoint when doing a recovery.  This causes slightly
   more IO, but on the other hand leads to more efficient databases,
   and the entire file is already "hot". */

{ "skiplist_unsafe", 0, SWITCH, "2.3.17" }
/* If enabled, this option forces the skiplist cyrusdb backend to
   not sync writes to the disk.  Enabling this option is NOT RECOMMENDED. */


{ "smtp_backend", "sendmail", STRINGLIST("host", "sendmail"), "3.1.4" }
/* The SMTP backend to use for sending email.

   The \"host\" backend sends message submissions via
   a TCP socket to the SMTP host defined in the config
   option smtp_host.

   The \"sendmail\" backend forks the Cyrus process into
   the executable defined in the config option sendmail.
   The executable must accept \"-bs\" as command line
   argument, read from stdin and must implement the minimum
   SMTP protocol as defined in section 4.5.1 of RFC 5321.

   If the SMTP EHLO command reports AUTH (RFC 4954) as a
   supported extension, then the MAIL FROM command includes
   the AUTH parameter, with its value set to the name of any
   authenticated user which triggered the email. The AUTH
   parameter is omitted if the user is unknown to the calling
   process.

   If the directory
   \fIconfigdirectory\fR/log/smtpclient.\ \fIsmtp_backend\fR
   exists, then telemetry logs for outgoing SMTP sessions will
   be created in this directory.
   */

{ "smtp_host", "localhost:587", STRING, "3.1.4" }
/* The SMTP host to use for sending mail (also see the
   smtp_backend option). The value of this option must
   the name or IP address of a TCP host, followed optionally
   by a colon and the port or service to use. The default
   port is 587. TLS may be activated by appending \"/tls\"
   to the value. Authentication is enabled if smtp_auth_authname
   is set. Authentication can be explicitly disabled by appending
   \"/noauth\" to the host address. */

{ "smtp_auth_authname", NULL, STRING, "3.1.4" }
/* The authentication name to use when authenticating to the SMTP
   server defined in smtp_host. */

{ "smtp_auth_password", NULL, STRING, "3.1.4" }
/* The password to use when authenticating to the SMTP server defined
   in smtp_host. */

{ "smtp_auth_realm", NULL, STRING, "3.1.4" }
/* The authentication SASL realm to use when authenticating to a SMTP
   server. */

{ "soft_noauth", 1, SWITCH, "2.3.17" }
/* If enabled, lmtpd returns temporary failures if the client does not
   successfully authenticate.  Otherwise lmtpd returns permanent failures
   (causing the mail to bounce immediately). */

{ "sortcache_db", "twoskip", STRINGLIST("skiplist", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for caching sort results (currently only
   used for xconvmultisort) */

{ "specialuse_extra", NULL, STRING, "2.5.0" }
/* Whitespace separated list of extra special-use attributes
   that can be set on a mailbox. RFC 6154 currently lists
   what special-use attributes can be set. This allows
   extending that list in the future or adding your own
   if needed. */

{ "specialuse_protect", "\\Archive \\Drafts \\Important \\Junk \\Sent \\Trash", STRING, "3.1.7" }
/* Whitespace separated list of special-use attributes
   to protect the mailboxes for.  If set, don't allow
   mailboxes with these special use attributes to be deleted
   or renamed to have a different parent. Default is the built-in list*/

{ "specialusealways", 1, SWITCH, "3.1.1" }
/* If enabled, this option causes LIST and LSUB output to always include
   the XLIST "special-use" flags */

{ "sql_database", NULL, STRING, "2.3.17" }
/* Name of the database which contains the cyrusdb table(s). */

{ "sql_engine", NULL, STRINGLIST("mysql", "pgsql", "sqlite"), "2.3.17" }
/* Name of the SQL engine to use. */

{ "sql_hostnames", "", STRING, "2.3.17" }
/* Comma separated list of SQL servers (in host[:port] format). */

{ "sql_passwd", NULL, STRING, "2.3.17" }
/* Password to use for authentication to the SQL server. */

{ "sql_user", NULL, STRING, "2.3.17" }
/* Username to use for authentication to the SQL server. */

{ "sql_usessl", 0, SWITCH, "2.3.17" }
/* If enabled, a secure connection will be made to the SQL server. */

{ "srs_alwaysrewrite", 0,  SWITCH, "2.5.0" }
/* If true, perform SRS rewriting for ALL forwarding, even when not required. */

{ "srs_domain", NULL, STRING, "3.1.2" }
/* The domain to use in rewritten addresses. This must point only to machines
   which know the encoding secret used by this system. When present, SRS is
   enabled. */

{ "srs_hashlength", 0, INT, "3.1.2" }
/* The hash length to generate in a rewritten address. */

{ "srs_secrets", NULL, STRING, "3.1.2" }
/* A list of secrets with which to generate addresses. */

{ "srs_separator", NULL, STRING, "3.1.2" }
/* The separator to appear immediately after SRS[01] in rewritten addresses. */

{ "srvtab", "", STRING, "2.3.17" }
/* The pathname of \fIsrvtab\fR file containing the server's private
   key.  This option is passed to the SASL library and overrides its
   default setting. */

{ "submitservers", NULL, STRING, "2.3.17" }
/* A list of users and groups that are allowed to resolve "urlauth=submit+"
   IMAP URLs, separated by spaces.  Any user listed in this will be
   allowed to fetch the contents of any valid "urlauth=submit+" IMAP URL:
   use with caution. */

{ "subscription_db", "flat", STRINGLIST("flat", "skiplist", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the subscriptions list. */

{ "suppress_capabilities", NULL, STRING, "3.0.0" }
/* Suppress the named capabilities from any capability response.  Use the
   exact case as it appears in the response, e.g.
   "suppress_capabilities: ESEARCH QRESYNC WITHIN XLIST LIST-EXTENDED"
   if you have a murder with 2.3.x backends and don't want clients being
   confused by new capabilities that some backends don't support. */

{ "statuscache", 0, SWITCH, "2.3.17" }
/* Enable/disable the imap status cache. */

{ "statuscache_db", "twoskip", STRINGLIST("skiplist", "sql", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the imap status cache. */

{ "statuscache_db_path", NULL, STRING, "2.5.0" }
/* The absolute path to the statuscache db file.  If not specified,
   will be configdirectory/statuscache.db */

{ "sync_authname", NULL, STRING, "2.5.0" }
/* The authentication name to use when authenticating to a sync server.
   Prefix with a channel name to only apply for that channel */

{ "sync_batchsize", 8192, INT, "3.0.0" }
/* the number of messages to upload in a single mailbox replication.
   Default is 8192.  If there are more than this many messages appended
   to the mailbox, generate a synthetic partial state and send that. */

{ "sync_cache_db", "twoskip", STRINGLIST("skiplist", "sql", "twoskip", "zeroskip"), "3.3.1" }
/* The cyrusdb backend to use for the replication cache. */

{ "sync_cache_db_path", NULL, STRING, "3.3.1" }
/* The path for the replication cache.  Prefix with a
   channel name to apply for that channel.  NOTE, it's
   quite important to have a different one per backend! */

{ "sync_host", NULL, STRING, "2.5.0" }
/* Name of the host (replica running sync_server(8)) to which
   replication actions will be sent by sync_client(8).
   Prefix with a channel name to only apply for that channel */

{ "sync_log", 0, SWITCH, "2.3.17" }
/* Enable replication action logging by lmtpd(8), imapd(8), pop3d(8),
   and nntpd(8).  The log {configdirectory}/sync/log is used by
   sync_client(8) for "rolling" replication. */

{ "sync_log_chain", 0, SWITCH, "2.4.0" }
/* Enable replication action logging by sync_server as well, allowing
   chaining of replicas.  Use this on 'B' for A => B => C replication layout */

{ "sync_log_channels", NULL, STRING, "2.5.0" }
/* If specified, log all events to multiple log files in directories
   specified by each "channel".  Each channel can then be processed
   separately, such as by multiple sync_client(8)s in a mesh replication
   scheme, or by squatter(8) for rolling search index updates.
   .PP
   You can use "" (the two-character string U+22 U+22) to mean the
   default sync channel. */

{ "sync_log_unsuppressable_channels", "squatter", STRING, "2.5.0" }
/* If specified, the named channels are exempt from the effect of setting
   sync_log_chain:off, i.e. they are always logged to by the sync_server
   process.  This is only really useful to allow rolling search indexing
   on a replica. */

{ "sync_password", NULL, STRING, "2.5.0" }
/* The default password to use when authenticating to a sync server.
   Prefix with a channel name to only apply for that channel */

{ "sync_port", NULL, STRING, "3.0.0" }
/* Name of the service (or port number) of the replication service on
   replica host.  Prefix with a channel name to only apply for that
   channel.  If not specified, and if sync_try_imap is set to "yes"
   (the default), then the replication client will first try "imap"
   (port 143) to check if imapd supports replication.  otherwise it
   will default to "csync" (usually port 2005). */

{ "sync_realm", NULL, STRING, "2.5.0" }
/* The authentication realm to use when authenticating to a sync server.
   Prefix with a channel name to only apply for that channel */

{ "sync_repeat_interval", "1s", DURATION, "3.1.8" }
/* Minimum interval between replication runs in rolling replication
   mode. If a replication run takes longer than this time, we repeat
   immediately.  Prefix with a channel name to only apply for that
   channel.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "sync_rightnow_channel", NULL, STRING, "3.3.1" }
/* if set, run sync_client to this channel immediately.  As with channels,
   set this value to '""' to sync the default channel! */

{ "sync_shutdown_file", NULL, STRING, "2.5.0" }
/* Simple latch used to tell sync_client(8) that it should shut down at the
   next opportunity. Safer than sending signals to running processes.
   Prefix with a channel name to only apply for that channel */

{ "sync_timeout", "30m", DURATION, "3.1.8" }
/* How long to wait for a response before returning a timeout failure
   when talking to a replication peer (client or server).  The minimum
   duration is 3 seconds, the default is 30 minutes.
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "sync_try_imap", 1, SWITCH, "3.0.0" }
/* Whether sync_client should try to perform an IMAP connection
   before falling back to csync.  If this is set to "no",
   sync_client will only use csync.  Prefix with a channel name to
   apply only for that channel */

{ "syslog_prefix", NULL, STRING, "3.1.8" }
/* String to be prepended to the process name in syslog entries. Can
   be further overridden by setting the $CYRUS_SYSLOG_PREFIX environment
   variable.
.PP
   Using the $CYRUS_SYSLOG_PREFIX environment variable has the additional
   advantage that it can be set before the \fBimapd.conf\fR is read, so
   errors while reading the config file can be syslogged with the correct
   prefix. */

{ "syslog_facility", NULL, STRING, "2.5.0" }
/* Configure a syslog facility.  The default is whatever is compiled
   in.  Allowed values are: DAEMON, MAIL, NEWS, USER, and LOCAL0
   through to LOCAL7 */

{ "tcp_keepalive", 0, SWITCH, "2.4.0" }
/* Enable keepalive on TCP connections */

{ "tcp_keepalive_cnt", 0, INT, "2.4.0" }
/* Number of TCP keepalive probes to send before declaring the
   connection dead (0 == system default) */

{ "tcp_keepalive_idle", "0", DURATION, "3.1.8" }
/* How long a connection must be idle before keepalive probes are sent
   (0 == system default).
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "tcp_keepalive_intvl", "0", DURATION, "3.1.8" }
/* Time between keepalive probes (0 == system default).
.PP
   For backward compatibility, if no unit is specified, seconds is
   assumed. */

{ "temp_path", "/tmp", STRING, "3.3.0" }
/* The pathname to store temporary files in. It is recommended to
   use an in-memory filesystem such as tmpfs for this path. */

{ "telemetry_bysessionid", 0, SWITCH, "3.0.0" }
/* If true, log by sessionid instead of PID for telemetry */

{ "timeout", "32m", DURATION, "3.1.8" }
/* The length of the IMAP server's inactivity autologout timer.
   The minimum value is 30 minutes.  The default is 32 minutes,
   to allow a bit of leeway for clients that try to NOOP every
   30 minutes.
.PP
   For backward compatibility, if no unit is specified, minutes
   is assumed. */

{ "imapidletimeout", NULL, DURATION, "3.1.8" }
/* Timeout for idling clients (RFC 2177).  If not set (the default),
   the value of "timeout" will be used instead.
.PP
   For backward compatibility, if no unit is specified, minutes
   is assumed. */

{ "tls_ca_file", NULL, STRING, "2.5.0", "2.5.0", "tls_client_ca_file" }
/* Deprecated in favor of \fItls_client_ca_file\fR. */

{ "tls_ca_path", NULL, STRING, "2.5.0", "2.5.0", "tls_client_ca_dir" }
/* Deprecated in favor of \fItls_client_ca_dir\fR. */

{ "tlscache_db", "twoskip", STRINGLIST("skiplist", "sql", "twoskip", "zeroskip"), "2.5.0", "2.5.0", "tls_sessions_db" }
/* Deprecated in favor of \fItls_sessions_db\fR. */

{ "tlscache_db_path", NULL, STRING, "2.5.0", "2.5.0", "tls_sessions_db_path" }
/* Deprecated in favor of \fItls_sessions_db_path\fR. */

{ "tls_cert_file", NULL, STRING, "2.5.0", "2.5.0", "tls_server_cert" }
/* Deprecated in favor of \fItls_server_cert\fR. */

{ "tls_cipher_list", "DEFAULT", STRING, "2.5.0", "2.5.0", "tls_ciphers" }
/* Deprecated in favor of \fItls_ciphers\fR. */

{ "tls_ciphers", "DEFAULT", STRING, "2.5.0" }
/* The list of SSL/TLS ciphers to allow.  The format of the string
   (and definition of "DEFAULT") is described in \fBciphers(1)\fR.
.PP
   See also Mozilla's server-side TLS recommendations:
.PP
   https://wiki.mozilla.org/Security/Server_Side_TLS */

{ "tls_crl_file", NULL, STRING, "3.1.2" }
/* Path to a file containing the Certificate Revocation List */

{ "tls_client_ca_dir", NULL, STRING, "2.5.0" }
/* Path to a directory containing the CA certificates used to verify
   client SSL certificates used for authentication. */

{ "tls_client_ca_file", NULL, STRING, "2.5.0" }
/* Path to a file containing the CA certificate(s) used to verify
   client SSL certificates used for authentication. */

{ "tls_client_cert", NULL, STRING, "2.5.0" }
/* File containing the certificate presented to a server for authentication
   during STARTTLS. A value of "disabled" will disable this server's use
   of certificate-based authentication. */

{ "tls_client_certs", "optional", ENUM("off", "optional", "require"), "2.5.0" }
/* Disable ("off"), allow ("optional", default) or require ("require") the
   use of SSL certificates by clients to authenticate themselves. */

{ "tls_client_key", NULL, STRING, "2.5.0" }
/* File containing the private key belonging to the tls_client_cert
   certificate. A value of "disabled" will disable this server's use
   of certificate-based authentication. */

{ "tls_eccurve", "prime256v1", STRING, "2.5.0" }
/* The elliptic curve used for ECDHE. Default is NIST Suite B prime256.
   See 'openssl ecparam -list_curves' for possible values. */

{ "tls_key_file", NULL, STRING, "2.5.0", "2.5.0", "tls_server_key" }
/* Deprecated in favor of \fItls_server_key\fR. */

{ "tls_required", 0, SWITCH, "3.0.0" }
/* If enabled, require a TLS/SSL encryption layer to be negotiated
   prior to ANY authentication mechanisms being advertised or allowed. */

{ "tls_prefer_server_ciphers", 0, SWITCH, "2.5.0" }
/* Prefer the ciphers on the server side instead of client side. */

{ "tls_server_ca_dir", NULL, STRING, "2.5.0" }
/* Path to a directory with CA certificates used to verify certificates
   offered by the server, when cyrus acts as client. This directory must
   have filenames with the hashed value of the certificates (see
   openssl(1)). */

{ "tls_server_ca_file", NULL, STRING, "2.5.0" }
/* Path to a file containing CA certificates used to verify certificates
   offered by the server, when cyrus acts as client. */

{ "tls_server_cert", NULL, STRING, "3.1.8" }
/* File containing the certificate, including the full chain, presented to clients.
   Two certificates can be set, e.g RSA and EC, if the filenames are separated with
   comma without spaces. */

{ "tls_server_dhparam", NULL, STRING, "3.1.4" }
/* File containing the DH parameters belonging to the certificate in
   tls_server_cert. */

{ "tls_server_key", NULL, STRING, "3.1.8" }
/* File containing the private key belonging to the certificate in
   tls_server_cert.  If not set, tls_server_cert must contain both private and
   public key.  Two files with keys can be set, if two certificates are used, in
   which case the files must be separated with comma without spaces */

{ "tls_sessions_db", "twoskip", STRINGLIST("skiplist", "sql", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the TLS cache. */

{ "tls_sessions_db_path", NULL, STRING, "2.5.0" }
/* The absolute path to the TLS sessions db file. If not specified,
   will be configdirectory/tls_sessions.db */

{ "tls_session_timeout", "24h", DURATION, "3.1.8" }
/* The length of time that a TLS session will be cached for later
   reuse.  The maximum value is 24 hours, also the default.  A
   value of 0 will disable session caching.
.PP
   For backward compatibility, if no unit is specified, minutes is
   assumed. */

{ "tls_versions", "tls1_0 tls1_1 tls1_2 tls1_3", STRING, "3.1.8" }
/* A list of SSL/TLS versions to not disable. Cyrus IMAP SSL/TLS starts
   with all protocols, and subtracts protocols not in this list. Newer
   versions of SSL/TLS will need to be added here to allow them to get
   disabled. */

{ "uidl_format", "cyrus", ENUM("uidonly", "cyrus", "dovecot", "courier"), "3.0.0" }
/* Choose the format for UIDLs in pop3.  Possible values are "uidonly",
   "cyrus", "dovecot" and "courier".  "uidonly" forces the old default
   of UID, "cyrus" is UIDVALIDITY.UID.  Dovecot is 8 digits of leading
   hex (lower case) each UID UIDVALIDITY. Courier is UIDVALIDITY-UID. */

{ "umask", "077", STRING, "2.3.17" }
/* The umask value used by various Cyrus IMAP programs. */

{ "userdeny_db", "flat", STRINGLIST("flat", "skiplist", "sql", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for the user access list. */

{ "userdeny_db_path", NULL, STRING, "2.5.0" }
/* The absolute path to the userdeny db file.  If not specified,
   will be configdirectory/user_deny.db */

{ "username_tolower", 1, SWITCH, "2.3.17" }
/* Convert usernames to all lowercase before login/authentication.  This
   is useful with authentication backends which ignore case during
   username lookups (such as LDAP).  */

{ "userprefix", "Other Users", STRING, "2.3.17" }
/* If using the alternate IMAP namespace, the prefix for the other users
   namespace.  The hierarchy delimiter will be automatically appended. */

# xxx badly worded
{ "unix_group_enable", 1, SWITCH, "2.3.17" }
/* Should we look up groups when using auth_unix (disable this if you are
   not using groups in ACLs for your IMAP server, and you are using auth_unix
   with a backend (such as LDAP) that can make getgrent() calls very
   slow) */

{ "unixhierarchysep", 1, SWITCH, "3.0.0" }
/* Use the UNIX separator character '/' for delimiting levels of
   mailbox hierarchy.  Turn off to use the netnews separator
   character '.'. Note that with the newnews separator, no dots may
   occur in mailbox names.  The default switched in 3.0 from off to on. */

{ "virtdomains", "off", ENUM("off", "userid", "on"), "3.1.8" }
/* Configure virtual domain support.
.PP
.IP off
Cyrus does not know or care about domains. Only the local part of email
addresses is ever considered.  This is not recommended for any deployment,
but is currently the default.
.\"
.IP userid
The user's domain is determined by splitting a fully qualified userid at the
last '@' or '%' symbol.  If the userid is unqualified, the \fIdefaultdomain\fR
will be used.  This is the recommended configuration for all deployments.
If you wish to provide calendaring services you must use this configuration.
.\"
.IP on
Fully qualified userids are respected, as per "userid".  Unqualified userids
will have their domain determined by doing a reverse lookup on the IP address
of the incoming network interface, or if no record is found, the
\fIdefaultdomain\fR will be used.

.PP
    */

{ "virusscan_notification_subject", "Automatically deleted mail", STRING, "3.1.8" }
/* The text used in the subject of email notifications created by
   \fBcyr_virusscan(8)\fR when deleting infected mail. */

{ "virusscan_notification_template", NULL, STRING, "3.1.8" }
/* The absolute path to a file containing a template to use to describe
   infected messages that have been deleted by \fBcyr_virusscan(8)\fR.
   See \fBcyr_virusscan(8)\fR for specification of the format of this file.
   If not specified, the builtin default template will be used. */

{ "xbackup_enabled", 0, SWITCH, "3.0.0" }
/* Enable support for the XBACKUP command in imapd.  If enabled, admin
   users can use this command to provoke a replication of specified users
   to the named backup channel. */

# Commented out - there's no such thing as "xlist-flag", but we need
# this for the man page
# { "xlist-flag", NULL, STRING, "3.0.0" }
/* Set the special-use flag \fIflag\fR on the specified folder when it
   is autocreated (see the \fIautocreate_inbox_folders\fR option).  For
   example, if \fBxlist-junk: Spam\fR is set, and the folder \fBSpam\fR
   is autocreated, the special-use flag \fB\\Junk\fR will be set on it.
.PP
   (This option is so named for backward compatibility with old config
   files.)
   */

{ "lmtp_catchall_mailbox", NULL, STRING, "2.5.0" }
/* Mail sent to mailboxes which do not exist, will be delivered to
   this user.  NOTE: This must be an existing local user name with an
   INBOX, NOT an email address! */

{ "zoneinfo_db", "twoskip", STRINGLIST("flat", "skiplist", "twoskip", "zeroskip"), "3.1.6" }
/* The cyrusdb backend to use for zoneinfo.  This database is used by the
   "tzdist" \fIhttpmodules\fR, and is managed by \fBctl_zoneinfo(8)\fR.*/

{ "zoneinfo_db_path", NULL, STRING, "2.5.0" }
/* The absolute path to the zoneinfo db file.  If not specified,
   will be configdirectory/zoneinfo.db */

{ "zoneinfo_dir", NULL, STRING, "3.2.0" }
/* The absolute path to the zoneinfo directory, containing timezone
   definitions as generated by the vzic tool.  If not specified, whatever
   definitions libical finds will be used.
.PP
   If you are providing a Time Zone Data Distribution Service (i.e. you have
   "tzdist" listed in \fIhttpmodules\fR), then this configuration option MUST
   be specified. */

{ "object_storage_enabled", 0, SWITCH, "3.0.0" }
/* Is Object storage enabled for this server.  You also need to have
   archiving enabled and archivepartition for the mailbox.
   Only email files will be stored on object Storage archive partition will be
   used to store any other files */

{ "object_storage_dummy_spool", NULL, STRING, "3.0.0" }
/* Dummy object storage spool; this is for test only.
   Spool where user directory (container) will be created to store all emails
   in a flat structure  */

{ "openio_namespace", NULL, STRING, "3.0.0" }
/* The OpenIO namespace used to store archived email messages. A namespace
   identifies the physical platform cyrus must contact. This directive is used
   by the OpenIO's SDK to locate its platform entry point. */

{ "openio_account", NULL, STRING, "3.0.0" }
/* The OpenIO account used to account for stored emails. Accounts are unique
   in their namespace. They provides virtual partitions, with quotas and QoS
   features. */

{ "openio_rawx_timeout", "30s", DURATION, "3.1.8" }
/* The OpenIO timeout to query to the RAWX services (default 30 sec). */

{ "openio_proxy_timeout", "5s", DURATION, "3.1.8" }
/* The OpenIO timeout to query to the PROXY services (default 5 sec). */

{ "openio_autocreate", 0, SWITCH, "3.0.0" }
/* Allow the OpenIO SDK to autocreate containers. Mainly destined to be turned
   on development environments. In production, the container should have been
   provisioned with the mailboxes. */

{ "openio_verbosity", NULL, STRING, "3.0.0" }
/* Sets the logging verbosity of the OpenIO's internal behavior. Admissible
   values are: "warning", "notice", "info", "debug", "trace", "quiet".
   The default verbosity is "warning". Set to "notice" for a few lines on a
   per-client basis. Set to "info" for a few lines on a per-request basis. Set
   to "debug" Set to "trace" to activate the underlying libcurl debug
   output. Enabling a verbosity higher to equal than "debug" requires
   the cyrus to be set in debug mode. The special "quiet" value disables all
   kinds of logging at the GLib level. */

{ "caringo_hostname", NULL, STRING, "3.0.0" }
/* The Caringo hostname used to store archived email messages. A hostname
   identifies the physical platform cyrus must contact. This directive is used
   by the Caringo's SDK (CastorSDK: Caringo Simple Content Storage Protocol (SCSP)
   on HTTP 1.1 using a RESTful architecture  */

{ "caringo_port", 80, INT, "3.0.0" }
/* The port of the caringo server (caringo_hostname); default is 80. */

{ "fastmailsharing", 0, SWITCH, "3.0.0" }
/* If enabled, use FastMail style sharing (oldschool full server paths) */

/*
.SH SEE ALSO
.PP
\fBimapd(8)\fR, \fBpop3d(8)\fR, \fBnntpd(8)\fR, \fBlmtpd(8)\fR,
\fBhttpd(8)\fR, \fBtimsieved(8)\fR, \fBidled(8)\fR, \fBnotifyd(8)\fR,
\fBdeliver(8)\fR, \fBmaster(8)\fR, \fBciphers(1)\fR
*/