1.\" 2.\" Copyright (c) 2008-2014, Simon Schubert <2@0x2c.org>. 3.\" Copyright (c) 2008 4.\" The DragonFly Project. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in 14.\" the documentation and/or other materials provided with the 15.\" distribution. 16.\" 3. Neither the name of The DragonFly Project nor the names of its 17.\" contributors may be used to endorse or promote products derived 18.\" from this software without specific, prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23.\" FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24.\" COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 26.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 30.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.Dd February 13, 2014 34.Dt DMA 8 35.Os 36.Sh NAME 37.Nm dma 38.Nd DragonFly Mail Agent 39.Sh SYNOPSIS 40.Nm 41.Op Fl DiOt 42.Op Fl A Ns Ar mode 43.Op Fl b Ns Ar mode 44.Op Fl f Ar sender 45.Op Fl L Ar tag 46.Op Fl o Ns Ar option 47.Op Fl r Ar sender 48.Op Fl q Ns Op Ar arg 49.Op Ar recipient ... 50.Sh DESCRIPTION 51.Nm 52is a small Mail Transport Agent (MTA), designed for home and office use. 53It accepts mails from locally installed Mail User Agents (MUA) and 54delivers the mails either locally or to a remote destination. 55Remote delivery includes several features like TLS/SSL support and SMTP 56authentication. 57.Pp 58.Nm 59is not intended as a replacement for real, big MTAs like 60.Xr sendmail 8 61or 62.Xr postfix 1 . 63Consequently, 64.Nm 65does not listen on port 25 for incoming connections. 66.Pp 67The options are as follows: 68.Bl -tag -width indent 69.It Fl A Ns Ar mode 70.Fl \&Ac 71acts as a compatibility option for sendmail. 72.It Fl b Ns Ar mode 73.Bl -tag -width indent 74.It Fl bp 75List all mails currently stored in the mail queue. 76.It Fl bq 77Queue the mail, but don't attempt to deliver it. 78See also the 79.Sq DEFER 80config file setting below. 81.El 82.Pp 83All other 84.Ar mode Ns 85s are ignored. 86.It Fl D 87Don't run in the background. 88Useful for debugging. 89.It Fl f Ar sender 90Set sender address (envelope-from) to 91.Ar sender . 92This overrides the value of the 93.Ev EMAIL 94environment variable, but is overridden by the 95.Sq MASQUERADE 96config file setting. 97.It Fl i 98Ignore dots alone on lines by themselves in incoming messages. 99This should be set if you are reading data from a file. 100.It Fl L Ar tag 101Set the identifier used in syslog messages to the supplied 102.Ar tag . 103This is a compatibility option for sendmail. 104.It Fl O 105This is a compatibility option for sendmail. 106.It Fl o Ns Ar option 107Specifying 108.Fl oi 109is synonymous to 110.Fl i . 111All other options are ignored. 112.It Fl q Ns Op Ar arg 113Process saved messages in the queue. 114The argument is optional and ignored. 115.It Fl r Ar sender 116Same as 117.Fl f . 118.It Fl t 119Obtain recipient addresses from the message header. 120.Nm 121will parse the 122.Li To: , 123.Li Cc: , 124and 125.Li Bcc: 126headers. 127The 128.Li Bcc: 129header will be removed independent of whether 130.Fl t 131is specified or not. 132.El 133.Sh CONFIGURATION 134.Nm 135can be configured with two config files: 136.Pp 137.Bl -bullet -compact 138.It 139auth.conf 140.It 141dma.conf 142.El 143.Pp 144These two files are stored per default in 145.Pa /etc/dma . 146.Sh FILE FORMAT 147Every file contains parameters of the form 148.Sq name value . 149Lines containing boolean values are set to 150.Sq NO 151if the line is commented and to 152.Sq YES 153if the line is uncommented. 154Empty lines or lines beginning with a 155.Sq # 156are ignored. 157Parameter names and their values are case sensitive. 158.Sh PARAMETERS 159.Ss auth.conf 160SMTP authentication can be configured in 161.Pa auth.conf . 162Each line has the format 163.Dq Li user|smarthost:password . 164.Ss dma.conf 165Most of the behaviour of 166.Nm 167can be configured in 168.Pa dma.conf . 169.Bl -tag -width 4n 170.It Ic SMARTHOST Xo 171(string, default=empty) 172.Xc 173If you want to send outgoing mails via a smarthost, set this variable to 174your smarthosts address. 175.It Ic PORT Xo 176(numeric, default=25) 177.Xc 178Use this port to deliver remote emails. 179Only useful together with the 180.Sq SMARTHOST 181option, because 182.Nm 183will deliver all mails to this port, regardless of whether a smarthost is set 184or not. 185.It Ic ALIASES Xo 186(string, default=/etc/aliases) 187.Xc 188Path to the local aliases file. 189Just stick with the default. 190The aliases file is of the format 191.Dl nam: dest1 dest2 ... 192In this case, mails to 193.Li nam 194will instead be delivered to 195.Li dest1 196and 197.Li dest2 , 198which in turn could be entries in 199.Pa /etc/aliases . 200The special name 201.Ql * 202can be used to create a catch-all alias, which gets used if no other 203matching alias is found. 204Use the catch-all alias only if you don't want any local mail to be 205delivered. 206.It Ic SPOOLDIR Xo 207(string, default=/var/spool/dma) 208.Xc 209Path to 210.Nm Ap s 211spool directory. 212Just stick with the default. 213.It Ic AUTHPATH Xo 214(string, default=not set) 215.Xc 216Path to the 217.Sq auth.conf 218file. 219.It Ic SECURETRANSFER Xo 220(boolean, default=commented) 221.Xc 222Uncomment if you want TLS/SSL secured transfer. 223.It Ic STARTTLS Xo 224(boolean, default=commented) 225.Xc 226Uncomment if you want to use STARTTLS. 227Only useful together with 228.Sq SECURETRANSFER . 229.It Ic FINGERPRINT Xo 230Pin the server certificate by specifying its SHA256 fingerprint. 231Only makes sense if you use a smarthost. 232.It Ic OPPORTUNISTIC_TLS Xo 233(boolean, default=commented) 234.Xc 235Uncomment if you want to allow the STARTTLS negotiation to fail. 236Most useful when 237.Nm 238is used without a smarthost, delivering remote messages directly to 239the outside mail exchangers; in opportunistic TLS mode, the connection will 240be encrypted if the remote server supports STARTTLS, but an unencrypted 241delivery will still be made if the negotiation fails. 242Only useful together with 243.Sq SECURETRANSFER 244and 245.Sq STARTTLS . 246.It Ic CERTFILE Xo 247(string, default=empty) 248.Xc 249Path to your SSL certificate file. 250.It Ic SECURE Xo 251(boolean, default=commented) 252.Xc 253Uncomment this entry and change it to 254.Sq INSECURE 255to use plain text SMTP login over an insecure connection. 256You have to rename this variable manually to prevent that you send your 257password accidentally over an insecure connection. 258.It Ic DEFER Xo 259(boolean, default=commented) 260.Xc 261Uncomment if you want that 262.Nm 263defers your mail. 264You have to flush your mail queue manually with the 265.Fl q 266option. 267This option is handy if you are behind a dialup line. 268.It Ic FULLBOUNCE Xo 269(boolean, default=commented) 270.Xc 271Uncomment if you want the bounce message to include the complete original 272message, not just the headers. 273.It Ic MAILNAME Xo 274(string, default=empty) 275.Xc 276The internet hostname 277.Nm 278uses to identify the host. 279If not set or empty, the result of 280.Xr gethostname 3 281is used. 282If 283.Sq MAILNAME 284is an absolute path to a file, the first line of this file will be used 285as the hostname. 286.It Ic MASQUERADE Xo 287(string, default=empty) 288.Xc 289Masquerade the envelope-from addresses with this address/hostname. 290Use this setting if mails are not accepted by destination mail servers 291because your sender domain is invalid. 292This setting overrides the 293.Fl f 294flag and the 295.Ev EMAIL 296environment variable. 297.Pp 298If 299.Sq MASQUERADE 300does not contain a 301.Li @ 302sign, the string is interpreted as a host name. 303For example, setting 304.Sq MASQUERADE 305to 306.Ql john@ 307on host 308.Ql hamlet 309will send all mails as 310.Ql john@hamlet ; 311setting it to 312.Ql percolator 313will send all mails as 314.Ql Sm off Va username @percolator . 315.Sm on 316.It Ic NULLCLIENT Xo 317.Xc 318Bypass aliases and local delivery, and instead forward all mails to 319the defined 320.Sq SMARTHOST . 321.Sq NULLCLIENT 322requires 323.Sq SMARTHOST 324to be set. 325.El 326.Ss Environment variables 327The behavior of 328.Nm 329can be influenced by some environment variables. 330.Bl -tag -width 4n 331.It Ev EMAIL Xo 332.Xc 333Used to set the sender address (envelope-from). 334Use a plain address, in the form of 335.Li user@example.com . 336This value will be overridden when the 337.Sq MASQUERADE 338config file setting or the 339.Fl f 340flag is used. 341.El 342.Sh SEE ALSO 343.Xr mailwrapper 8 , 344.Xr sendmail 8 345.Rs 346.%A "J. B. Postel" 347.%T "Simple Mail Transfer Protocol" 348.%O RFC 821 349.Re 350.Rs 351.%A "J. Myers" 352.%T "SMTP Service Extension for Authentication" 353.%O RFC 2554 354.Re 355.Rs 356.%A "P. Hoffman" 357.%T "SMTP Service Extension for Secure SMTP over TLS" 358.%O RFC 2487 359.Re 360.Sh HISTORY 361The 362.Nm 363utility first appeared in 364.Dx 1.11 . 365.Sh AUTHORS 366.An -nosplit 367.Nm 368was written by 369.An Matthias Schmidt Aq Mt matthias@dragonflybsd.org 370and 371.An Simon Schubert Aq Mt 2@0x2c.org . 372