How can I distinguish if a message has been sent encrypted or encrypted upon reception?
I have checked the setting "Activate PGP encryption for incoming e-mails."
Every message now shows "This Email was sent using PGP encryption. It has been decrypted with your private key.", even for messages that have been sent unencrypted (which were encrypted upon reception).
Is there a way to tell if the message was sent encrypted or if it was encrypted later?