[Dovecot] Pointers for developing a proper encryption plugin?

[Willie Gillespie]

tomas at tuxteam.de wrote:
> Hm. I think I didn't express my idea correctly. The decryption has to
> happen client-side if it has to be any worth, IMO.
> 
> As Timo said downthread, there is already such a plugin, but... this
> would support decryption server-side (which IMO would be wrong anyway).
> 
> For client-side decryption, the infrastructure is (almost) completely
> there. GPG for the client (and encryption on delivery -- but every
> delivery agent I know of has some hooks for filtering messages).

There is also S/MIME encryption built in to many clients.