The widespread availability of “bulletproof” hosting in China has made that country a haven for spammers, according to a blog post by University of Alabama researcher Gary Warner, referenced in a Friday article by PC World.

According to the blog post, Warner, director of research in computer forensics at the university’s computer and information sciences department, examined the millions of spam messages received in the UAB Spam Data Mine between May 1 and June 18, 2009, discovering that 70 percent of all domains used in spam have a .cn top-level domain.

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