As a Mac newbie, I have noticed an increase in the amount of spam that I get compared to my Windows environment, in which I had used several purchased anti-spam solutions, the latest being a part of the ZoneAlarm Security Suite (which uses an embedded version of MailFrontier, which has excellent performance). The documentation says that Mail's built-in spam filtering "will take a while to learn" from my actions. However, I have been using it for about three weeks now and a lot of spam still gets through. I am wondering if it just needs more time, or a more powerful solution is needed. If so, what are the most highly regarded applications? I have found SpamSieve most prominent in some preliminary searching.