I am happy with this docker-based solution: https://gioorgi.com/2020/mail-server-on-docker/ https://gioorgi.com/2020/mail-server-on-docker/ I am running it a

I am happy with this docker-based solution: https://gioorgi.com/2020/mail-server-on-docker/ https://gioorgi.com/2020/mail-server-on-docker/ I am running it and require very little mantenance. The documentation is very well done and I was able to setup all the stuff needed in a short time. Also paid hosting solution tend to be very pricely if you need more than 3-4 accounts. My solution instead required only some setup effort, less than one day.