mutemule

Slightly different markets: Proton and Tuta are both end-to-end encrypted, Posteo is not.

There’s a lot of downsides that come with E2E encryption for email. I have some domains with Tuta, and some with Posteo and Mailbox.

Have a look at Tuta. They don’t have the same breadth of service as Proton or Mailbox, but they’re pretty good and constantly improving. I don’t really understand why they’re not better known.

My only issue is their spam filter is kinda bad.