If I'm not mistaken.. in order to use the pgpmail.cgi script to secure
emails, it must be used in conjunction with the PGP (Pretty Good Privacy)
software installed on your server. The pgpmail.cgi script is simply a form
to email script that interacts with PGP to handle the encrypted contents of
the message as it's being downloaded from the server to a user's local PC..
The user then (also having the PGP client installed on their local PC)
receives an encrypted email, which they decrypt in their email client (like
Outlook or Eudora) using PGP. I could be totally off here, but I'm fairly
sure this is the correct scenario and use of pgpmail.cgi. Basically you'll
need to have PGP installed on your machine (server), to use the pgpmail.cgi
script. Without PGP, pgpmail.cgi is just a simple form to email script.