Email is always a nightmare. My ex runs a BSD mail server that seems to work alright (and he has a cloud service that will handle mail in the event of a server failure). Me? I pay Fastmail like $50/year to do that for me, and they’re wonderful. I tried to sign up for a trial with my own domain, and when I got a strange error that didn’t let me log in, I put in a ticket (as a non-customer) and the issue was rectified quickly.

I swear, I don’t work for Fastmail, but I’d much rather use them (or any email provider that is halfway decent) than fiddle with my own mail server.