SMTPD(8)                OpenBSD System Manager's Manual               SMTPD(8)

NAME
     smtpd - Simple Mail Transfer Protocol daemon

SYNOPSIS
     smtpd [-dnv] [-D macro=value] [-f file]

DESCRIPTION
     smtpd is a Simple Mail Transfer Protocol (SMTP) daemon which can be used
     as a machine's primary mail system.  smtpd can listen on a network
     interface and handle SMTP transactions; it can also be fed messages
     through the standard sendmail(8) interface.  It can relay messages
     through remote mail transfer agents or store them locally using either
     the mbox or maildir format.  This implementation supports SMTP as defined
     by RFC 5321 as well as several extensions.  A running smtpd can be
     controlled through smtpctl(8).

     The options are as follows:

     -D macro=value
             Define macro to be set to value on the command line.  Overrides
             the definition of macro in the configuration file.

     -d      Do not daemonize.  If this option is specified, smtpd will run in
             the foreground and log to stderr.

     -f file
             Specify an alternative configuration file.

     -n      Configtest mode.  Only check the configuration file for validity.

     -v      Produce more verbose output.

     smtpd is not enabled by default.  In order to use it as the system
     mailer, ensure the mail queue is empty, then stop sendmail(8):

           # pkill sendmail

     Modify the current mailwrapper(8) settings by editing /etc/mailer.conf:

           sendmail        /usr/sbin/smtpctl
           send-mail       /usr/sbin/smtpctl
           mailq           /usr/sbin/smtpctl
           makemap         /usr/libexec/smtpd/makemap
           newaliases      /usr/libexec/smtpd/makemap

     Rebuild the aliases database, and enable the daemon:

           # newaliases
           # echo "sendmail_flags=NO" >> /etc/rc.conf.local
           # echo "smtpd_flags=" >> /etc/rc.conf.local
           # smtpd

FILES
     /etc/mail/smtpd.conf    Default smtpd configuration file.
     /var/run/smtpd.sock     UNIX-domain socket used for communication with
                             smtpctl(8).

SEE ALSO
     smtpd.conf(5), mailwrapper(8), smtpctl(8)

     Simple Mail Transfer Protocol, RFC 5321, October 2008.

HISTORY
     The smtpd program first appeared in OpenBSD 4.6.

OpenBSD 4.9                      May 24, 2010                      OpenBSD 4.9