I ran my own server for many years. There was a learning curve to all the fiddly bits (Postfix Configuration, SPF, DKIM, DMARC, SpamAssassin) required to get the world to see your server as worthy. There’s also the problem of finding a “clean” IP that’s not been blacklisted by some spam database. And even then, once in a while you end up in a database for who knows what reason. These things often made the email less useful as sometimes I’d end up in people’s spam folder.

It was a good experience as I learned a lot. But it was also a constant headache. One I felt I didn’t want to keep “learning” that particular thing I just moved to ProtonMail and haven’t looked back.