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.

The denial-of-service attacks launched on Web sites in South Korea and the United States earlier this month appear to have come from a master server in the United Kingdom, according to security researchers in Vietnam.