or [F] if the signature verificationn failed. If you do not have
the sender's public key you can fetch it with GETKEY command.
-If you do want to verify the signatures from received messages
+If you don't want to verify the signatures from received messages
you may do /SET ignore_messages_signatures on. In this case
signatures in messages are ignored and they appear as normal
non-signed messages. By default, all message signatures are