skullgiver , 5 hours ago

Your messages won’t work right in some Office365 servers that inject the “this email came from outside of your organisation” banner into the body. Oh, and people who get notifications about your email will only see the PGP header string.

Other than that, I don’t see the problem. Just make sure not to sign any emails that you don’t mind being used against you in court, because PGP accidentally makes it possible to prove your laptop was used to send your messages.

On the plus side, the 12 people you’ll ever meet that also use PGP will send you encrypted emails. Just make sure you keep those old, expired keys around, or you won’t be able to read your old emails back.