Just four months ago, the world enjoyed a brief reduction in spam with the closure of McColo, a U.S.-based Web host that was accused of being a major hub for spammer activity, including a massive botnet called Srbizi.Within less than one month, traffic began to bounce back and spammers had redesigned their new botnets to incorporate the lessons learned from the shut down of Srbizi.
http://www.internetnews.com/security/article.php/3810446
Report Says Spam Arms Race Escalating
Just four months ago, the world enjoyed a brief reduction in spam with the closure of McColo, a U.S.-based Web host that was accused of being a major hub for spammer activity, including a massive botnet called Srbizi.