[mawalu]

I use mailcow and it does both a) and b) very well. You can either selfhost or pay the developer to host it for you: https://github.com/mailcow/mailcow-dockerized

[Faaak]

+1 For mailcow !

A simple `docker-compose up -d` does the job. Then you just have to configure your records (SPF, MX, DMARC, ...) and it's all set.

A really nice work from the mailcow's team !