[saladuh]

Migadu http://migadu.com/

Super nice people, when you email them for support they're fast and thorough. Their founders are/have been active on here, and they're currently investing in foss projects by hiring sourcehut.org (Simon Ser and Drew DeVault) to build a new web mail built on modern Go libraries https://git.sr.ht/~migadu/alps.

They've got a list of pros/cons here https://www.migadu.com/procon/

I'll shill them any day because I appreciate their simple goal of creating a good email service with no extra unicord dust, marketing, etc on top, plus their willingness to work on open technologies.

They've got what you'd expect for the price, unlimited domains, great admin dashboard, etc etc. CalDAV and CardDAV come out of beta very soon (end of September iirc).