A lot of spam today originates from "zombie" computers. A "bot" travels around looking for unpatched vulnerabilities to exploit. It finds its way in and sets up housekeeping including installing an SMTP (email) server on the vulnerable computer and reports back to a "bot herder" who then sets it up to spew out spam. When its found and quarantined or shut down, they move to another zombie in the herd...sometimes hour by hour.
One of the things these bots do is grab address lists. Once they have your address, you can expect to be both the target for some of this spam as well as the "originator" since they can put *anything* in the from: line. If you find you are suddenly getting more than in recent days, it could be because your address was recently "harvested" this way.
Spammers are evil. I know my employer has paid me for a lot of hours put in setting up, maintaining and tweaking our spam filter. As such, its not just an annoyance, it costs money. Multiply this by thousands of companies...
Paul
Last edited by pcarpenter; 01-28-2009 at 05:19 PM.
Paul Carpenter
Mapleton, IL