[exim] automagic GnuPG handling

Hi list

My first posting.

Can exim4 handle GnuPG automagically? What I am imagining is the
following two senarios:

outgoing messages > check if recipient’s public key is known > encrypt
> send message as normal

incoming messages > check if message is encrypted and sender’s public
key is known > decrypt > save message as normal

Is this within exim’s capabilities?

Can anyone please advise on how to implement this?
--
Daniel