Reports Show Significant Drops in Spam Levels Since Rustock Botnet Takedown - But Will Rustock Be Back?The Rustock Botnet was sending as many as 13.82 Billion spam emails each day before being taken down early this month by an effort headed by Microsoft in cooperation with authorities and the legal system.According to Symantec’s March 2011 MessageLabs Intelligence Report, the Rustock botnet had been responsible for an average of 28.5% of global spam sent from all botnets in March.

