I can't compare services too well but I'll toss Migadu into the hat. https://www.migadu.com/en/index.html https://www.migadu.com/en/index.html It's basically

I can't compare services too well but I'll toss Migadu into the hat. https://www.migadu.com/en/index.html https://www.migadu.com/en/index.html It's basically just an IMAP server. They have webmail but otherwise it's on you to provide a client. So far it's been great, I switched from gmail and I am not looking back. They give really nice clear instructions on setting up your DNS properly and the pricing isn't too bad. My main motivation was to get onto a service that lets me have my own domain. Once you're off gmail you are then free to choose and switch between whatever you like.