Botnet-controlled PCs are responsible for some 83 per cent of all spam messages, according to a recent report. Security firm MessageLabs 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 through the use of botnet-infected systems.
http://www.v3.co.uk/v3/news/2245041/botnets-pushing-spam-loads
