1) That's patently not true. It's their special flavor of encrypted email that's not compatible with IMAP.
2) I value IMAP far far far more than I value their special flavor of encrypted email. If they'd let me turn the latter off in exchange for IMAP without the crazy converter, I'd have chosen Proton when I was cutting Google out of emails.
2) I value IMAP far far far more than I value their special flavor of encrypted email. If they'd let me turn the latter off in exchange for IMAP without the crazy converter, I'd have chosen Proton when I was cutting Google out of emails.