Howto integrate (G/P)GP into sendmail -D?!

[eisert@cybersite.de]

Hi there!
  I just stopped by the webpages, so please
  give me a cc:Eisert@Lokales.de THANX!

   Actually i wonder how to integrate the
   PGP stuff into a sendmaildaemon, since
   i've several users in an intranet and want
   to automatically crypt just the outgoing
   mails... is there a good FAQ about this?!
   BTW, is this stuff usable for VPN's?!
    (FreeBSD/Linux)

   Thanks in advance!

   bjoern

    Eisert@Lokales.de