[ Thanks to Joe for
this link. ]
This article will explain how to create a shared, central area
for users to contribute spam that they’ve received in their email.
From this central area, an admin can run sa-learn–a tool that
teaches SpamAssassin about new spam–on a periodic basis to sweep
the directory.“I’ll be using Dovecot for the IMAP server. POP3 won’t work for
this project since it doesn’t support server-side folders. However,
if you’re still strictly using POP3 on your server, I’d advise
looking at a calendar. I’ll also be using Maildir to store the
mail. Again, if you’re using mbox, please upgrade…”