@Johns_priv Regarding that case, the name/address of the terrorism suspect was actually given to police by Apple, not Proton. The terror suspect added their real-life Apple email as an optional recovery address in Proton Mail. Proton can't decrypt data, but in terror cases Swiss courts can obtain recovery email.

Setting a recovery email is optional, and you can read about other recovery methods here: https://proton.me/support/set-account-recovery-methods