I've been interested in offering customers to train manually train the SpamAssassin Bayes filter for ham and spam (to reduce false positives and negatives). However, I can only find documentation to this for local mailboxes and IMAP. Most users however, retrieve their mail through POP and use Outlook (Express) as mail client. Is there a way to train SpamAssassin with such a setup (e.g. forwarding mail with Outlook (Express) using SMTP)?
If you want to do a lot of programming, you could save all incoming messages for a few days in a database somewhere. When a user forwards a message to a special "ham" or "spam" mailbox, you pull the message-id from the message and use it to recover the original message from your database.
-Kevin
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