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Botnets pushing up spam loads

by Marianna Schmudlach / July 1, 2009 12:47 AM PDT

Over four-fifths of junk messages come from infected machines

Shaun Nichols in San Francisco, 30 Jun 2009

Botnet-controlled PCs are responsible for 83 per cent of all spam messages, according to the latest figures from MessageLabs.

The security firm said in a recent report that, despite efforts to shut down service providers notorious for hosting shady operations, spam vendors are continuing to send out huge loads of junk mail via botnet-infected systems.

Researchers estimate that spam levels in June reached 90 per cent of the total global email load, holding steady from May. It is estimated that 83.2 per cent of those spam messages were coming from botnets.


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