In reply to

I used to host OpenSMTPD + rspamd + Dovecot, but I really don’t have the energy to be a sysadmin soooo.. I’m just using Migadu now.

And these pre-made docker images and other “mail in a box” solutions don’t really let you not be a sysadmin, they only do the setup (which I can do on my own, thanks) but they can’t do backup, monitoring, they won’t investigate mail not going through, they won’t solve running out of disk space…