I need to run my own email server for some of my domains, because the providers that I usually use don’t support them (they use Unicode characters, and not everyone supports that yet). I have a small VPS that I run a few Docker containers on, and I’m wanting to try and run an email server on it as well. What containers are good for a low-hassle email setup? I don’t need a mailbox webui (ex: round cube), but it would be nice to have a UI for management. I do need multi-domain support, however.
The other server sends again until it times out? Never been an issue, that’s just how email works. Most SMTP servers will attempt for a few days if they know the MX is valid. Besides, I’ve never been out for longer than an hour or two.