365 lines
8.7 KiB
Groff
365 lines
8.7 KiB
Groff
.\"
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.\" Copyright (c) 2008-2014, Simon Schubert <2@0x2c.org>.
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.\" Copyright (c) 2008
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.\" The DragonFly Project. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in
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.\" the documentation and/or other materials provided with the
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.\" distribution.
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.\" 3. Neither the name of The DragonFly Project nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific, prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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.\" FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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.\" COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
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.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd February 13, 2014
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.Dt DMA 8
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.Os
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.Sh NAME
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.Nm dma
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.Nd DragonFly Mail Agent
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.Sh SYNOPSIS
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.Nm
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.Op Fl DiOt
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.Op Fl A Ns Ar mode
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.Op Fl b Ns Ar mode
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.Op Fl f Ar sender
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.Op Fl L Ar tag
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.Op Fl o Ns Ar option
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.Op Fl r Ar sender
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.Op Fl q Ns Op Ar arg
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.Op Ar recipient ...
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.Sh DESCRIPTION
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.Nm
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is a small Mail Transport Agent (MTA), designed for home and office use.
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It accepts mails from locally installed Mail User Agents (MUA) and
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delivers the mails either locally or to a remote destination.
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Remote delivery includes several features like TLS/SSL support and SMTP
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authentication.
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.Pp
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.Nm
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is not intended as a replacement for real, big MTAs like
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.Xr sendmail 8
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or
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.Xr postfix 1 .
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Consequently,
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.Nm
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does not listen on port 25 for incoming connections.
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl A Ns Ar mode
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.Fl \&Ac
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acts as a compatibility option for sendmail.
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.It Fl b Ns Ar mode
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.Bl -tag -width indent
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.It Fl bp
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List all mails currently stored in the mail queue.
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.It Fl bq
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Queue the mail, but don't attempt to deliver it.
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See also the
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.Sq DEFER
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config file setting below.
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.El
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.Pp
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All other
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.Ar mode Ns
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s are are ignored.
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.It Fl D
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Don't run in the background.
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Useful for debugging.
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.It Fl f Ar sender
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Set sender address (envelope-from) to
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.Ar sender .
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This overrides the value of the environment variable
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.Ev EMAIL .
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.It Fl i
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Ignore dots alone on lines by themselves in incoming messages.
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This should be set if you are reading data from a file.
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.It Fl L Ar tag
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Set the identifier used in syslog messages to the supplied
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.Ar tag .
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This is a compatibility option for sendmail.
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.It Fl O
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This is a compatibility option for sendmail.
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.It Fl o Ns Ar option
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Specifying
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.Fl oi
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is synonymous to
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.Fl i .
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All other options are ignored.
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.It Fl q Ns Op Ar arg
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Process saved messages in the queue.
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The argument is optional and ignored.
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.It Fl r Ar sender
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Same as
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.Fl f .
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.It Fl t
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Obtain recipient addresses from the message header.
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.Nm
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will parse the
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.Li To: ,
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.Li Cc: ,
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and
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.Li Bcc:
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headers.
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The
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.Li Bcc:
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header will be removed independent of whether
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.Fl t
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is specified or not.
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.El
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.Sh CONFIGURATION
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.Nm
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can be configured with two config files:
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.Pp
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.Bl -bullet -compact
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.It
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auth.conf
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.It
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dma.conf
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.El
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.Pp
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These two files are stored per default in
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.Pa /etc/dma .
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.Sh FILE FORMAT
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Every file contains parameters of the form
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.Sq name value .
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Lines containing boolean values are set to
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.Sq NO
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if the line is commented and to
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.Sq YES
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if the line is uncommented.
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Empty lines or lines beginning with a
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.Sq #
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are ignored.
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Parameter names and their values are case sensitive.
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.Sh PARAMETERS
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.Ss auth.conf
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SMTP authentication can be configured in
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.Pa auth.conf .
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Each line has the format
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.Dq Li user|smarthost:password .
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.Ss dma.conf
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Most of the behaviour of
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.Nm
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can be configured in
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.Pa dma.conf .
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.Bl -tag -width 4n
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.It Ic SMARTHOST Xo
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(string, default=empty)
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.Xc
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If you want to send outgoing mails via a smarthost, set this variable to
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your smarthosts address.
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.It Ic PORT Xo
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(numeric, default=25)
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.Xc
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Use this port to deliver remote emails.
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Only useful together with the
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.Sq SMARTHOST
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option, because
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.Nm
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will deliver all mails to this port, regardless of whether a smarthost is set
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or not.
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.It Ic ALIASES Xo
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(string, default=/etc/aliases)
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.Xc
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Path to the local aliases file.
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Just stick with the default.
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The aliases file is of the format
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.Dl nam: dest1 dest2 ...
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In this case, mails to
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.Li nam
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will instead be delivered to
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.Li dest1
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and
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.Li dest2 ,
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which in turn could be entries in
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.Pa /etc/aliases .
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The special name
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.Ql *
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can be used to create a catch-all alias, which gets used if no other
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matching alias is found.
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Use the catch-all alias only if you don't want any local mail to be
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delivered.
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.It Ic SPOOLDIR Xo
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(string, default=/var/spool/dma)
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.Xc
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Path to
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.Nm Ap s
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spool directory.
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Just stick with the default.
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.It Ic AUTHPATH Xo
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(string, default=not set)
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.Xc
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Path to the
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.Sq auth.conf
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file.
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.It Ic SECURETRANS Xo
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(boolean, default=commented)
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.Xc
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Uncomment if you want TLS/SSL secured transfer.
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.It Ic STARTTLS Xo
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(boolean, default=commented)
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.Xc
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Uncomment if you want to use STARTTLS.
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Only useful together with
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.Sq SECURETRANS .
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.It Ic OPPORTUNISTIC_TLS Xo
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(boolean, default=commented)
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.Xc
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Uncomment if you want to allow the STARTTLS negotiation to fail.
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Most useful when
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.Nm
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is used without a smarthost, delivering remote messages directly to
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the outside mail exchangers; in opportunistic TLS mode, the connection will
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be encrypted if the remote server supports STARTTLS, but an unencrypted
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delivery will still be made if the negotiation fails.
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Only useful together with
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.Sq SECURETRANS
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and
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.Sq STARTTLS .
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.It Ic CERTFILE Xo
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(string, default=empty)
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.Xc
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Path to your SSL certificate file.
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.It Ic SECURE Xo
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(boolean, default=commented)
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.Xc
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Uncomment this entry and change it to
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.Sq INSECURE
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to use plain text SMTP login over an insecure connection.
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You have to rename this variable manually to prevent that you send your
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password accidentally over an insecure connection.
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.It Ic DEFER Xo
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(boolean, default=commented)
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.Xc
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Uncomment if you want that
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.Nm
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defers your mail.
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You have to flush your mail queue manually with the
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.Fl q
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option.
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This option is handy if you are behind a dialup line.
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.It Ic FULLBOUNCE Xo
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(boolean, default=commented)
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.Xc
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Uncomment if you want the bounce message to include the complete original
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message, not just the headers.
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.It Ic MAILNAME Xo
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(string, default=empty)
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.Xc
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The internet hostname
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.Nm
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uses to identify the host.
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If not set or empty, the result of
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.Xr gethostname 3
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is used.
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If
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.Sq MAILNAME
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is an absolute path to a file, the first line of this file will be used
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as the hostname.
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.It Ic MASQUERADE Xo
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(string, default=empty)
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.Xc
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Masquerade the envelope-from addresses with this address/hostname.
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Use this setting if mails are not accepted by destination mail servers
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because your sender domain is invalid.
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This setting is overridden by the
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.Fl f
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flag and the
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.Ev EMAIL
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environment variable.
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.Pp
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If
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.Sq MASQUERADE
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does not contain a
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.Li @
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sign, the string is interpreted as a host name.
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For example, setting
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.Sq MASQUERADE
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to
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.Ql john@
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on host
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.Ql hamlet
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will send all mails as
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.Ql john@hamlet ;
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setting it to
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.Ql percolator
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will send all mails as
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.Ql Sm off Va username @percolator .
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.Sm on
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.It Ic NULLCLIENT Xo
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.Xc
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Bypass aliases and local delivery, and instead forward all mails to
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the defined
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.Sq SMARTHOST .
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.Sq NULLCLIENT
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requires
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.Sq SMARTHOST
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to be set.
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.El
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.Ss Environment variables
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The behavior of
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.Nm
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can be influenced by some environment variables.
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.Bl -tag -width 4n
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.It Ev EMAIL Xo
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.Xc
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Used to set the sender address (envelope-from).
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Use a plain address, in the form of
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.Li user@example.com .
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This value will be overridden when the
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.Fl f
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flag is used.
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.El
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.Sh SEE ALSO
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.Xr mailaddr 7 ,
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.Xr mailwrapper 8 ,
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.Xr sendmail 8
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.Rs
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.%A "J. B. Postel"
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.%T "Simple Mail Transfer Protocol"
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.%O RFC 821
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.Re
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.Rs
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.%A "J. Myers"
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.%T "SMTP Service Extension for Authentication"
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.%O RFC 2554
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.Re
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.Rs
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.%A "P. Hoffman"
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.%T "SMTP Service Extension for Secure SMTP over TLS"
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.%O RFC 2487
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.Re
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Dx 1.11 .
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.Sh AUTHORS
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.An -nosplit
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.Nm
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was written by
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.An Matthias Schmidt Aq Mt matthias@dragonflybsd.org
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and
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.An Simon Schubert Aq Mt 2@0x2c.org .
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