Reviewed by chdionn
Spamassassin is integrated with the Evolution email client on my Fedora Linux system. I've used it for a year or so and it worked well except that every 4 to 6 weeks spam started slipping by it and I had to retrain it by selecting the spam emails in Evolution and marking them as junk.
I found after some googling that you have to train it on regular email too by using the command line:
sa-learn --ham --mbox [insert the path to your mailbox here]
Works much better now.