angry tapir writes "More than 40 percent of the world's spam is coming from a single network of computers that computer security experts continue to battle, according to new statistics from Symantec's MessageLabs' division. The Rustock botnet has shrunk since April, when about 2.5 million computers were infected with its malicious software that sent about 43 billion spam e-mails per day. Much of it is pharmaceutical spam."
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