1<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" 2 "http://www.w3.org/TR/html4/loose.dtd"> 3<html> <head> 4<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> 5<title> Postfix manual - showq(8) </title> 6</head> <body> <pre> 7SHOWQ(8) SHOWQ(8) 8 9<b>NAME</b> 10 showq - list the Postfix mail queue 11 12<b>SYNOPSIS</b> 13 <b>showq</b> [generic Postfix daemon options] 14 15<b>DESCRIPTION</b> 16 The <a href="showq.8.html"><b>showq</b>(8)</a> daemon reports the Postfix mail queue status. 17 It is the program that emulates the sendmail `mailq' com- 18 mand. 19 20 The <a href="showq.8.html"><b>showq</b>(8)</a> daemon can also be run in stand-alone mode by 21 the superuser. This mode of operation is used to emulate 22 the `mailq' command while the Postfix mail system is down. 23 24<b>SECURITY</b> 25 The <a href="showq.8.html"><b>showq</b>(8)</a> daemon can run in a chroot jail at fixed low 26 privilege, and takes no input from the client. Its service 27 port is accessible to local untrusted users, so the ser- 28 vice can be susceptible to denial of service attacks. 29 30<b>STANDARDS</b> 31 None. The <a href="showq.8.html"><b>showq</b>(8)</a> daemon does not interact with the out- 32 side world. 33 34<b>DIAGNOSTICS</b> 35 Problems and transactions are logged to <b>syslogd</b>(8). 36 37<b>CONFIGURATION PARAMETERS</b> 38 Changes to <a href="postconf.5.html"><b>main.cf</b></a> are picked up automatically as <a href="showq.8.html"><b>showq</b>(8)</a> 39 processes run for only a limited amount of time. Use the 40 command "<b>postfix reload</b>" to speed up a change. 41 42 The text below provides only a parameter summary. See 43 <a href="postconf.5.html"><b>postconf</b>(5)</a> for more details including examples. 44 45 <b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b> 46 The default location of the Postfix <a href="postconf.5.html">main.cf</a> and 47 <a href="master.5.html">master.cf</a> configuration files. 48 49 <b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b> 50 How much time a Postfix daemon process may take to 51 handle a request before it is terminated by a 52 built-in watchdog timer. 53 54 <b><a href="postconf.5.html#duplicate_filter_limit">duplicate_filter_limit</a> (1000)</b> 55 The maximal number of addresses remembered by the 56 address duplicate filter for <a href="aliases.5.html"><b>aliases</b>(5)</a> or <a href="virtual.5.html"><b>vir-</b></a> 57 <a href="virtual.5.html"><b>tual</b>(5)</a> alias expansion, or for <a href="showq.8.html"><b>showq</b>(8)</a> queue dis- 58 plays. 59 60 <b><a href="postconf.5.html#empty_address_recipient">empty_address_recipient</a> (MAILER-DAEMON)</b> 61 The recipient of mail addressed to the null 62 address. 63 64 <b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b> 65 The time limit for sending or receiving information 66 over an internal communication channel. 67 68 <b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b> 69 The maximum amount of time that an idle Postfix 70 daemon process waits for an incoming connection 71 before terminating voluntarily. 72 73 <b><a href="postconf.5.html#max_use">max_use</a> (100)</b> 74 The maximal number of incoming connections that a 75 Postfix daemon process will service before termi- 76 nating voluntarily. 77 78 <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b> 79 The process ID of a Postfix command or daemon 80 process. 81 82 <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b> 83 The process name of a Postfix command or daemon 84 process. 85 86 <b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b> 87 The location of the Postfix top-level queue direc- 88 tory. 89 90 <b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b> 91 The syslog facility of Postfix logging. 92 93 <b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b> 94 The mail system name that is prepended to the 95 process name in syslog records, so that "smtpd" 96 becomes, for example, "postfix/smtpd". 97 98<b>FILES</b> 99 /var/spool/postfix, queue directories 100 101<b>SEE ALSO</b> 102 <a href="pickup.8.html">pickup(8)</a>, local mail pickup service 103 <a href="cleanup.8.html">cleanup(8)</a>, canonicalize and enqueue mail 104 <a href="qmgr.8.html">qmgr(8)</a>, queue manager 105 <a href="postconf.5.html">postconf(5)</a>, configuration parameters 106 <a href="master.8.html">master(8)</a>, process manager 107 syslogd(8), system logging 108 109<b>LICENSE</b> 110 The Secure Mailer license must be distributed with this 111 software. 112 113<b>AUTHOR(S)</b> 114 Wietse Venema 115 IBM T.J. Watson Research 116 P.O. Box 704 117 Yorktown Heights, NY 10598, USA 118 119 SHOWQ(8) 120</pre> </body> </html> 121