11) Poland 2.7%

12) Taiwan 2.6%

Other 40.3%

"The chief driver for Asia's dominance in the spam charts is the sheer number of compromised computers in the continent," said Graham Cluley, senior technology consultant at Sophos. "Malicious hackers hijack poorly-protected computers, and command them - without their owners realising - to send out unwanted money-making messages and malicious links. Everyone has a responsibility to ensure that their PC or Mac is properly defended against such attacks. If they take no care over their computers they're simply adding to the world's spam problem."