Spam attacks where the text is replaced with images aimed at lightly protected email systems are growing in popularity. With the variety of anti-spam filters that analyze the message content to weed out unsolicited emails, spammers continue to increasingly adopt image spam. Businesses, organizations and everyday computer users might have noted an increase of image-based spam, text e-mails that arrive in your in-box as image files. Image spam can contain a picture of words, a screenshot, a photographic image, or a combination of these. By sending emails that contain no text, only pictures, spammers found that they can fool even the most advanced anti-spam software like SpamAssassin, G-Lock SpamCombat.
Most anti-spam programs detect text-based spam very well, but they totally fail when a spam message has no text to analyze. Thus, the rapid rise of the image spams. These spam messages often include image files that have a screen shot offering the same types of information advertised in more traditional text spam. Image spam can also include unique trackers which work when a recipient opens the message and let the sender know it’s a valid email address, ripe for future...