Snowshoe Spam--a New Type of Junk Email--Starting to Clog Inboxes

Snowshoe spammers spread their message over many different IP addresses, each used in low volume, to send the message.

"Bypassing filters is a big money-making effort for snowshoe advertisers, and as long as you’re facing off against intelligent adversaries who have a financial incentive to keep trying until they get through, they will keep coming up with advances in spam warfare techniques," Wosotowsky said.