I use Earthlink's online spam blocked and it does quite well. I usually review messaged BEFORE downloading to my PC either by visiting the Earthlink e-mail/spam blocker OR using ePrompter.
ePrompter was advertised on Tech TVs "The Screen Savers" and it will go out and check all my e-mail accounts at once and report back to me the ASCII (text only) version so that I may delete any questionable or suspect e-mails before they get on my system. I have not been successfully attacked (gotten onto my system) for about 18 months using this process (implimented about 18 months ago).
ePromtper is freeware. They do accept donations but they are not mandatory.
[www.eprompter.com]
Doug vV