Note that Proton Mail servers don't hold your private master key directly — it is always stored encrypted with your password. Also, Proton Mail allows you to im

Note that Proton Mail servers don't hold your private master key directly — it is always stored encrypted with your password. Also, Proton Mail allows you to import your keys: https://proton.me/support/pgp-key-management https://proton.me/support/pgp-key-management