An e-mail subject not being encrypted by PGP should be prominently mentioned

> It depends on how you use email for private and sensitive correspondance and what you write in your subject line. Yes, exactly. > Why exactly? So that people are aware and don’t put anything sensitive into the subject line, feeling a false sense of security. Again, normal people don’t expect an encrypted email would have unencrypted subject. Most people would not consider the subject to be metadata, if they use it as summary of the message in they normal daily use. It’s a quite nasty foot-gun for people who don’t research these things in depth and just rely on the guides.