In 2001, spam accounted for an estimated 5% of our email. In 2007, it clogs our inboxes to the tune of 90-95% of all email sent, according to a new report released today by Barracuda Networks. Barracuda, a leading vendor of spam filtering technology, based their analysis on the over 1 billion emails that the company's software scans each day. The year-over-year increase appears to indicate the failure of the US federal CAN-SPAM Act, which was passed in 2004 when spam only accounted for about 70% of all email sent.