Regarding your second edit. It doesn't provide end to end encryption, which is what people immediately think of when PGP encryption of email is discussed. End t

Regarding your second edit. It doesn't provide end to end encryption, which is what people immediately think of when PGP encryption of email is discussed. End to end encryption is still the best possible option, but it requires both parties to be involved. What it does provide however is the next best thing, for people who receive non-encrypted email. It protects your mail content even if your IMAP account details are compromised. It protects your mail if the mail server is compromised, and it protects your mail if one of your mail clients is taken.