procmail recipe and gpg?

[Stormer's Cgi-Archive]

Does anyone have a good procmail recipe for gpg?

I'd like it so that any email sent to an email account is encrypted
with that users public gpg key.

Don't need to worry about attachments.

An example application of this would be...

Simple perl scripts that send an email to a user on the same server.
This way, anything sent to that end user would be encrypted.  The end
user could then pop the mail off the server and decrypt it with their
local private key.

Many thanks!

James