What I'm trying to do is be able to take all incoming messages and encrypt them with that users public pgp key.
I'm running postfix + courier etc. http://flurdy.com/docs/postfix/
I've read through this https://grepular.com/Automatically_Encrypting_all_Incoming_Email and that makes sense to me, but it's for all mail for a single user.
I've looked into gpg-mailgate ( I cant post any more links )
Also using an after queue content filter hook to grab the email per user and then pass it off, encrypt, then pass back in to be delivered.
My question is, has anyone successfully implemented this sort of setup? I'm curious as to what happens if an already encrypted message comes through?
Just looking for some direction here. There seem to be a few options and I'm not sure which if any is correct.