Version 1.4.3 of Richard Gooch's set of daemons which give almost
transparent PGP integration with mailers on Unix boxes which use
sendmail as their transfer agent. PGPsendmail replaces the real
sendmail with a daemon to handle encryption of outgoing mail and then
hands on the result to the real sendmail daemon.
Included is a daemon to deal with automatic decryption and signing of
mail, if you trust a daemon with your PGP passphrase.