Comment by alpaca128

I personally use mailbox.org for years now. Granted, I don't have remotely the usage mentioned in the linked issue and I know users that aren't very satisfied with features like the integrated office webapp, but it does everything I need (emails & calendar sync) and I haven't found a reason not to trust them.

Originally my reason to choose them instead of Protonmail was that Protonmail only works with their official client, which is a far too limiting dependency in my eyes.