Fastmail is the best I've used. If EU jurisdiction is important to you, Runbox* and Mailfence are pretty ok - their service isn't as well-documented nor polish

Fastmail is the best I've used. If EU jurisdiction is important to you, Runbox* and Mailfence are pretty ok - their service isn't as well-documented nor polished/reliable as Fastmail (e.g. I've hit some odd errors fetching large amounts of messages over IMAP - e.g. connecting a new client and blind first big sync of mail on an account with a large archive) but overall they're both extremely serviceable. Re: mail interfaces, Runbox's is a little better than Mailfence, but both are a little dated. Again, Fastmail is better here; non-EU is their only fault imo. * Runbox is technically not actually EU, per se, being Norwegian.