Please sign your outgoing mails if you have a key. Of the PGP mails I get, most are just encrypted to me. That is cryptographically not a sound idea, but it al

Please sign your outgoing mails if you have a key. Of the PGP mails I get, most are just encrypted to me. That is cryptographically not a sound idea, but it also means that I cannot encrypt back, because I don't know which key to encrypt to. The keyservers do not validate anything. They are just a storage medium. In fact, for my personal e-mail address, a prankster has uploaded a rogue key. There is no process by which I can ask for its removal. People who just take the key from the keyserver have a 50% chance to send me data I cannot decrypt. This is not a PGP weakness. It has been quipped that cryptography is a method to reduce a generic problem to a key exchange problem. There is some truth to that.