For the self-hosted folks there are:
https://mailcow.email/ - dockerized, works with multiple domains, sogo for groupware. Compared to mailinabox's single disk, it has 6 docker volumes to keep track of.
https://mailu.io/ - dockerized, it has a section on kubernetes deployments, which i find weird, but I guess could make sense for companies
https://mailinabox.email/ - no docker, no multiple domains, roundcube, nextcloud for groupware. Main disadvantage or advantage, depending on your perspective is that you need a mailinabox server per domain.
And then this is the more hands on version, which I guess would be sovereign as ansible deployment.
https://github.com/sovereign/sovereign
IMHO sovereign puts too many attack vectors on a single machine.
https://mailcow.email/ - dockerized, works with multiple domains, sogo for groupware. Compared to mailinabox's single disk, it has 6 docker volumes to keep track of.
https://mailu.io/ - dockerized, it has a section on kubernetes deployments, which i find weird, but I guess could make sense for companies
https://mailinabox.email/ - no docker, no multiple domains, roundcube, nextcloud for groupware. Main disadvantage or advantage, depending on your perspective is that you need a mailinabox server per domain.
And then this is the more hands on version, which I guess would be sovereign as ansible deployment.
https://github.com/sovereign/sovereign
IMHO sovereign puts too many attack vectors on a single machine.