Infomaniak (swiss) has a decent deal of a couple of free mailboxes with any domain you own through them. The webmail client kinda sucks but I just sync it with native clients. Using username:password for SMTP feels pretty weak tho they don't have Oauth2 support. lol now I'm talking myself out of it but it's worked great for years.
Unless you blog about it angrily enough that you somehow make it to the HN front page and some insider sees it and solves the problem for you.
Getting my own domain and setting up email on it is one of the best things I've ever done.