Would you like to help fight spam? If you have a tux.org email address, you can feed spam and ham messages into the spamassassin Bayesian filters used by tux.org. Simply create two folders, LearnAsSpam and LearnAsHam, and populate them with spam and ham samples. Once a day, all of the messages in these folders will be collected into a single mailbox to be fed to sa-learn.
Note, when the mail is collected, it will be removed from your LearnAsSpam and LearnAsHam folders. Don't put anything there you want to keep!