C’mon people… please update your virus definitions and scan your machines :( Most spam comes from just six botnets | The Register: By John Leyden → More by this author Published Friday 29th February 2008 15:16 GMT Six botnets are responsible for 85 per cent of all spam, according to an analysis by net security firm Marshal. The Srizbi botnet is reckoned to be the largest single source of spam.. Read More