According to an annual survey by MessageLabs, spam comprised 87.7 percent of all e-mail traffic in 2009, reaching a high of 90.4 percent in May and a low of 73.3 percent in February.

“Junk volumes increased still further compared to the 81.2 percent spam rate recorded by MessageLabs in 2008,” writes The Register’s John Leyden.

“Compromised (zombie) machines accounted for more than four in five (83.4 percent) of an estimated global volume of 107 billion junk mail messages sent out every day during 2009,” Leyden writes.

Click here to read the article at The Register.