MessageLabs Intelligence Report: Increased Number of Spam Spikes and New Image Spam Techniques Cause Trouble for Businesses: “Analysis of [May 2007] data showed that spammers continue to innovate and employ new methods to elude traditional anti-spam solutions. Rather than embedding images in the body of an email message, spammers are now hosting images on sites that do not require registration and include links to those sites or an HTML image in the email message.”