hMailServer (Progressive Robot's fork)

Progressive Robot's fork of hMailServer, not the original by Martin Knafve, which
is developed separately and has releases of its own. The fork's home is https://gitlab.com/hmailserver/hmailserver.

hMailServer is a mail server: SMTP in and out, IMAP and POP3, with spam and
virus checks, DKIM, SPF, DMARC and ARC, and its administration over a REST API
and the Control Deck page that API serves. It keeps its accounts and settings
in a PostgreSQL or MariaDB/MySQL database of yours, reached over the network,
and its messages under /var/snap/hmailserver/common.

After installing, point it at its database and start it:

 sudo snap set hmailserver db.type=postgresql db.host=192.0.2.10 \

     db.name=hmailserver db.user=hmailserver

 printf '%s\n' 'the database password' | sudo hmailserver.set-database-password

 sudo snap start --enable hmailserver.daemon

The documentation: https://gitlab.com/hmailserver/hmailserver/-/blob/master/hmailserver/docs/Snap.md