[Updated at 11:00 p.m.] Oleg Nikolaenko, a Russian man the FBI believes has been responsible for one-third of the spam in your inbox, pleaded not guilty Friday in federal court in Wisconsin.

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[Posted at 10:20 a.m.] A Russian man the FBI believes has been responsible for one-third of the spam you get in your inbox is scheduled to be arraigned in a Milwaukee, Wisconsin, court Monday.

According to court documents and FBI affidavits, researchers began tracking down the "Mega-D" spam automated botnet as a prime source of selling counterfeit goods, and the mastermind of it all is Oleg Nikolaenko.

"'Mega-D" was likely the largest botnet in the world, accounting for 32% of all spam," the court documents said. "Security researchers estimated that the botnet was capable of sending ten billion spam email messages a day.”