Spam now 90 percent of all e-mail

Spam now accounts for 90.4 percent of all e-mail, according to a report released Monday from security vendor Symantec. This means that 1 out of every 1.1 e-mails is junk. The report also notes that spam shot up 5.1 percent just from April to May. Symantec's May 2009 MessageLabs Intelligence report reveals other disturbing trends, as well. Rather than just hijack disreputable Web sites, cybercriminals now favor older and well-established domains to host their malware. The report says 84.6 percent of all domains blocked for malicious content are more than a year old. One type of domain now especially vulnerable to threats is social networking, since most of the sites' content is created by users.