Spam levels have risen over the past month to more than 90 percent of all corporate e-mail, according to Symantec’s May 2009 MessageLabs Intelligence Report (PDF). The latest report effectively communicates the concept of “spam, boy there sure is a lot of it,” but goes into detail about the latest trends in spamming activity like botnet activity and the use of social networks.
In May, spam rose by 5.1 percent over April, with 57.6 of it coming from known botnets. One particular botnet called Donbot was named as the most active, and is responsible for 18.2 percent of all spam. Symantec wrote that much of the remainder (42.4 percent) of spam originated out of smaller or unclassified botnets.
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