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 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.
- -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 three config files:
+o auth.conf
+o dma.conf
+o virtusertable
These three 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=mail.example.com)
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
'SECURETRANS'. - 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'. - MAILNAMEFILE (string, default=empty)
The name of the file to read the 'MAILNAME' from.
- virtusertable
- 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.
SEE ALSO
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.
HISTORY
The dma utility first appeared in DragonFly 1.11.
AUTHORS
- dma was written by Matthias Schmidt <matthias@dragonflybsd.org> and
Simon Schubert <corecode@dragonflybsd.org>.