I am trying to encrypt sensitive information in an e-mail, to a company that has its own encryption key.
I have imported the key successfully (although they have something called "Fingerprint", "Long ID" and "Short ID", that I am not sure what does to be exact). The OpenPGP option however, keeps being greyed out. It says in parenthesis (Plain Text Only). How can I encrypt it?
As an added bonus, if you know how to do that then you might know what they mean: they say that I have to encrypt both the e-mail and the picture, which I just assume would be done as soon as I attach it to an encrypted e-mail, but the parenthesis worries me in that regard.
Might I add, it was greyed out before and after attaching a file.