[aquatica]

> However, the mailbox as a whole is encrypted at rest

The server still receives from other servers and from the client (if the email is not going to a proton account) the plain text, so nothing prevents them from making a copy.

[chuckadams]

email is not Signal, and Proton cannot magically turn on encryption for every sender in the world.

[riku_iki]

how other providers (gmail) work in this case?..