sa-quicktrain is a script that lets you designate specific messages to be trained using SpamAssassin. It differs from other approaches in that it works from inside the client.

To use this:

Whenever the script runs it will retrain all messages in Train.Spam as spam, then file them into the Spam folder. Then it will retrain all messages in Train.Ham as ham, and file them into INBOX. You will need to go back and refile retrained ham messages into the folder to which they should have been delivered.

Caveats & Notes