Spam remains a serious problem today because spam emails continue to be a very profitable business for spammers. Spam email takes on various forms from adult content, selling products/services, pharmaceuticals to stock promotions, job offers, etc. These unsolicited email messages are a nuisance and spam emails can also be offensive to your end-users (particularly adult content). Email spammers are constantly pioneering new techniques to bypass email anti-spam filter solutions forcing organizations to invest in spam email prevention solutions and anti-spam filters that can keep up with the evolving approaches. As long as spam emails make money, email spammers will continue to send out a barrage of unsolicited email messages.