I found an interesting, if somewhat depressing, article at NetworkWorld:
The world’s antispam systems are fighting a furious but hopeless battle against botnet spam, a new threat analysis from Commtouch has claimed.
According to the U.S. company’s zombie monitor, by the time that reputation and source analysis systems have identified compromised PCs and servers responsible for sending the spam that floods the Internet every day, most botnets will have shifted to using new machines.1
Footnotes
- John E. Dunn, Botnets Winning Spam Wars, Says Report, NetworkWorld (2008), https://web.archive.org/web/20080713034550/http://www.networkworld.com/news/2008/070908-botnets-winning-spam-wars-says.html (last visited Jul 11, 2008). ↩︎