This post is about how to make maling lists in OpenBSD (whose current version is 6.5).
Add a line for the list to
firstname.lastname@example.org some_user ... email@example.com nobody ... firstname.lastname@example.org vmail ... + email@example.com firstname.lastname@example.org, email@example.com, ...
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"
/etc/mail/domains is like:
Without any additional servers, it has no functionality such as editing subjects or bodies, but is perhaps the simplest.