I'm thinking about signing all emails with PGP to let people know who also use it. However, this might confuse novice users. So I can: -Sign all emails, that will show: -Sign all emails with PGP/MIME. The email itself stays clean, but they will have the signature.asc file as attachment. -Not sign the emails, and add my Key ID into the standard plain text/HTML signature of the email client. Less confusing than the other options, but unsigned.