OpenSMTPD 6.5: Mailing list

( modified )

This post is about how to make maling lists in OpenBSD (whose current version is 6.5.)

With OpenSMTPD (and Dovecot, optionally), this method is perhaps the simplest.

Add a line for the list to /etc/mail/users like:

where /etc/mail/smtpd.conf is:

table domains           file:/etc/mail/domains
table users             file:/etc/mail/users

listen on lo0
listen on egress \
        tls pki <pki> \
        auth-optional \
        tag MTA

action "local" maildir alias <aliases>
action "domains" lmtp "/var/dovecot/lmtp" rcpt-to virtual <users>

match tag MTA   from any                for domain <domains>    action "domains"
match           from local              for local               action "local"

and also /etc/mail/domains is like:


Compliting the configuration, emails sent to “[email protected]” are forwarded to “[email protected], [email protected], …” directly.

Without any additional servers, it has no functionality such as editing subjects or bodies, but is perhaps the simplest.

Comments or feedbacks are welcomed and appreciated.