DMA(8)                  FreeBSD System Manager's Manual                 DMA(8)

NAME
     dma - DragonFly Mail Agent

SYNOPSIS
     dma [-DiOt] [-Amode] [-bmode] [-f sender] [-L tag] [-ooption] [-r sender]
         [-q[arg]] [recipient ...]

DESCRIPTION
     dma is a small Mail Transport Agent (MTA), designed for home and office
     use.  It accepts mails from locally installed Mail User Agents (MUA) and
     delivers the mails either locally or to a remote destination.  Remote
     delivery includes several features like TLS/SSL support and SMTP
     authentication.

     dma is not intended as a replacement for real, big MTAs like sendmail(8)
     or postfix(1).  Consequently, dma does not listen on port 25 for incoming
     connections.

     The options are as follows:

     -Amode  -Ac acts as a compatibility option for sendmail.

     -bmode

             -bp     List all mails currently stored in the mail queue.

             -bq     Queue the mail, but do not attempt to deliver it.  See
                     also the `DEFER' config file setting below.

             All other modes are ignored.

     -D      Do not run in the background.  Useful for debugging.

     -f sender
             Set sender address (envelope-from) to sender.  This overrides the
             value of the EMAIL environment variable, but is overridden by the
             `MASQUERADE' config file setting.

     -i      Ignore dots alone on lines by themselves in incoming messages.
             This should be set if you are reading data from a file.

     -L tag  Set the identifier used in syslog messages to the supplied tag.
             This is a compatibility option for sendmail.

     -O      This is a compatibility option for sendmail.

     -ooption
             Specifying -oi is synonymous to -i.  All other options are
             ignored.

     -q[arg]
             Process saved messages in the queue.  The argument is optional
             and ignored.

     -r sender
             Same as -f.

     -t      Obtain recipient addresses from the message header.  dma will
             parse the To:, Cc:, and Bcc: headers.  The Bcc: header will be
             removed independent of whether -t is specified or not.

CONFIGURATION
     dma can be configured with two config files:

     •   auth.conf
     •   dma.conf

     These two files are stored per default in /etc/dma.

FILE FORMAT
     Every file contains parameters of the form `name value'.  Lines
     containing boolean values are set to `NO' if the line is commented and to
     `YES' if the line is uncommented.  Empty lines or lines beginning with a
     `#' are ignored.  Parameter names and their values are case sensitive.

PARAMETERS
   auth.conf
     SMTP authentication can be configured in auth.conf.  Each line has the
     format "user|smarthost:password".

   dma.conf
     Most of the behaviour of dma can be configured in dma.conf.

     SMARTHOST (string, default=empty)
           If you want to send outgoing mails via a smarthost, set this
           variable to your smarthosts address.

     PORT (numeric, default=25)
           Use this port to deliver remote emails.  Only useful together with
           the `SMARTHOST' option, because dma will deliver all mails to this
           port, regardless of whether a smarthost is set or not.

     ALIASES (string, default=/etc/aliases)
           Path to the local aliases file.  Just stick with the default.  The
           aliases file is of the format
                 nam: dest1 dest2 ...
           In this case, mails to nam will instead be delivered to dest1 and
           dest2, which in turn could be entries in /etc/aliases.  The special
           name `*' can be used to create a catch-all alias, which gets used
           if no other matching alias is found.  Use the catch-all alias only
           if you do not want any local mail to be delivered.

     SPOOLDIR (string, default=/var/spool/dma)
           Path to dma's spool directory.  Just stick with the default.

     AUTHPATH (string, default=not set)
           Path to the `auth.conf' file.

     SECURETRANSFER (boolean, default=commented)
           Uncomment if you want TLS/SSL secured transfer.

     STARTTLS (boolean, default=commented)
           Uncomment if you want to use STARTTLS.  Only useful together with
           `SECURETRANSFER'.

     FINGERPRINT (string, default=empty)
           Pin the server certificate by specifying its SHA256 fingerprint.
           Only makes sense if you use a smarthost.

     OPPORTUNISTIC_TLS (boolean, default=commented)
           Uncomment if you want to allow the STARTTLS negotiation to fail.
           Most useful when dma is used without a smarthost, delivering remote
           messages directly to the outside mail exchangers; in opportunistic
           TLS mode, the connection will be encrypted if the remote server
           supports STARTTLS, but an unencrypted delivery will still be made
           if the negotiation fails.  Only useful together with
           `SECURETRANSFER' and `STARTTLS'.

     CERTFILE (string, default=empty)
           Path to your SSL certificate file.

     SECURE (boolean, default=commented)
           Uncomment this entry and change it to `INSECURE' to use plain text
           SMTP login over an insecure connection.  You have to rename this
           variable manually to prevent that you send your password
           accidentally over an insecure connection.

     DEFER (boolean, default=commented)
           Uncomment if you want that dma defers your mail.  You have to flush
           your mail queue manually with the -q option.  This option is handy
           if you are behind a dialup line.

     FULLBOUNCE (boolean, default=commented)
           Uncomment if you want the bounce message to include the complete
           original message, not just the headers.

     MAILNAME (string, default=empty)
           The internet hostname dma uses to identify the host.  If not set or
           empty, the result of gethostname(3) is used.  If `MAILNAME' is an
           absolute path to a file, the first line of this file will be used
           as the hostname.

     MASQUERADE (string, default=empty)
           Masquerade the envelope-from addresses with this address/hostname.
           Use this setting if mails are not accepted by destination mail
           servers because your sender domain is invalid.  This setting
           overrides the -f flag and the EMAIL environment variable.

           If `MASQUERADE' does not contain a @ sign, the string is
           interpreted as a host name.  For example, setting `MASQUERADE' to
           `john@' on host `hamlet' will send all mails as `john@hamlet';
           setting it to `percolator' will send all mails as
           `username@percolator'.

     NULLCLIENT (boolean, default=commented)
           Bypass aliases and local delivery, and instead forward all mails to
           the defined `SMARTHOST'.  `NULLCLIENT' requires `SMARTHOST' to be
           set.

   Environment variables
     The behavior of dma can be influenced by some environment variables.

     EMAIL
           Used to set the sender address (envelope-from).  Use a plain
           address, in the form of user@example.com.  This value will be
           overridden when the `MASQUERADE' config file setting or the -f flag
           is used.

SEE ALSO
     mailaddr(7), mailwrapper(8), sendmail(8)

     J. B. Postel, Simple Mail Transfer Protocol, RFC 821.

     J. Myers, SMTP Service Extension for Authentication, RFC 2554.

     P. Hoffman, SMTP Service Extension for Secure SMTP over TLS, RFC 2487.

HISTORY
     The dma utility first appeared in DragonFly 1.11.

AUTHORS
     dma was written by Matthias Schmidt <matthias@dragonflybsd.org> and Simon
     Schubert <2@0x2c.org>.

FreeBSD 13.1-RELEASE-p6          May 20, 2017          FreeBSD 13.1-RELEASE-p6