DragonFly Mail Agent


     dma -- DragonFly Mail Agent


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


     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

     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

     The options are as follows:

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


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

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

             All other modes are are ignored.

     -D      Don't run in the background.  Useful for debugging.

     -f sender
             Set sender address to sender.

     -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.

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

             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.


     dma can be configured with three config files:

     +o   auth.conf
     +o   dma.conf
     +o   virtusertable

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


     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.


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

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

     SMARTHOST (string,
           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.

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

     VIRTPATH (string, default=commented)
           Path to the 'virtusertable' file.

     AUTHPATH (string, default=commented)
           Path to the 'auth.conf' file.

     VIRTUAL (boolean, default=commented)
           Uncomment if you want virtual user support.

     SECURETRANS (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

     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 'SECURETRANS'
           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.

     DBOUNCEPROG (string, default=dbounce-simple-safecat)
           Leave this entry commented if you want the default behavior of dma
           upon double bounces - just abort the delivery.  Otherwise,
           uncomment it and specify the name or full path to a program that
           will process the bounced bounce message.

           The program will be invoked with several command-line options:

           dbounce -t dma -a bounced@email.address -i queueid -f messagefile

     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 name to be used when introducing this host, if different from
           the result of hostname(1).  If specified, this option overrides

     MAILNAMEFILE (string, default=empty)
           The name of the file to read the 'MAILNAME' from.

     The virtusertable file specifies a virtual user table.  Each line has the
     format ``localuser:mail-address''.  Some smarthosts do not accept mails
     from unresolvable email address (e.g. user@localhost) so you have to
     rewrite your outgoing email address to a valid address.


     dbounce-simple-safecat(1), 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.


     The dma utility first appeared in DragonFly 1.11.


     dma was written by Matthias Schmidt <> and
     Simon Schubert <>.