I stopped running my own a while ago. Its no longer really decentralized and the big players (google/microsoft) will often just blacklist you for little reason.

That said I DO maintain my own domain and backups. So i can take my email to whatever hosting provider I want.

I also noticed, during the migration, that if you simply register your domain with one of the big players (ie: Google Workspace or M365) you will often get whitelisted and email will flow easier. This was easier when they had a free tier though.

I originally did but the maintenance burden was killing me. Then last year Proton unified their subscription with VPN and Mail (also upgrading my Proton VPN only subscription to Proton plus) and from there I decided to just go all in on Proton mail. I integrated my domain to Proton mail and never looked back.

E-mail was the first "thing" that got me off of Google (to Proton & then currently Tutanota) but is really the last remaining service I not have self hosted.

I have always read about how difficult and time consuimg it was to run your own mail server, but I felt like I needed to experience it myself. So I purchased another domain and followed the instructions on https://mailinabox.email/.

I am using a small VPS on Hetzner and I have to say the experience has been almost flawless so far. I did need to have my new domain taken off the Domain Block List, but Hetzner gave me a clean IP and defaults to blocking port 25 outbound to prevent spam (simple ticket to open, once account is 30 days old and paid).

I know I'm still early into this journey so far, but it has been really simple and I plan to test this secondary domain for a few months before moving onto it full time.

As an avid self hosted of literally everything else, I can say it has been a lot of fun learning so far!

@DidacticDumbass
Yes I run my own mailserver. I have done it for the last 15 years or so.

I'm also running my own Friendica instance.

I did for a couple years, but moved to mailbox.org a while ago. The effort was much to high to save a few bucks and there is no real upside to it. E-Mail is a troublesome mixture of different protocols from the internet stone age held together by chewing gum (SMTP, POP3, IMAP, DNS, database or file storage, maybe ActiveSync, Web-Mailer, ...)

Even when everything is up and running there is always maintenance to keep your SSL certificates up to date, update your incoming spam filter technique, keep other mail providers assured that you are not spamming (DKIM, etc.), keep all the different system services (see above) up to date and interoperable, etc. and every few years when you want to move to a new server, provider or Linux distro you start it all over again.