@Tommy @Tutanota Do any of these have an opensource backend? And even with that, what's stopping them from reading and selling your emails? Even protonmail receives them in plaintext, otherwise they wouldn't know who to deliver it to.
There are very good reasons to move away from Google and Microsoft, but being "Open Source" has nothing to do with it.
There are very good reasons to move away from Google and Microsoft, but being "Open Source" has nothing to do with it.
@tadzik
You do make a very good point there.
K-9 Mail is fully Open source with PGP Encryption.
Email is, unfortunately, inherently insecure. Some providers are better than others, sure, but there is no *guarantees* you can get as an end-user.