@crashtestdev I’ve been using IONOS (and their predecessor 1to1) for the last 23 years. Not free but cheap. I think it costs me about £20 a year end I’ve never had a problem. They’re European and the mail works with both Thunderbird and Outlook and probably more browsers, or just via the web. And you get to choose your own domain name - I went with a .me.uk one.

@LMac1970 Thank you, I remember seeing the ads ever so often, didn't realise they were Euro-based! That's cool