Anti Spam software is a necessity because Spam compromises the security of your computers and exposes it to various risks besides being a permanent source of botheration. Before we learn about anti-spam software, we need to first know what is spam. To put it succinctly, spam is unsolicited and unwanted email. Other names for spam are Unsolicited Bulk Mail, Excessive Multi-Posting, and Unsolicited Commercial email, in addition to the more common – spam mail, bulk email or just junk mail. The advent of email brought in an era of instant communication, where information reaches our desktops, at negligible cost, and in no time at all, from across the globe.

Along with the benefits, came the negative aspects of email. For the multitudes of marketing hawks out there, this was an opportunity to send unsolicited promotions of their products, instantly, and at a very low cost. Today, spam has reached such monumental proportions that 10 out of every 13 emails (76.9%) we receive are spam, one way or the other. This is why anti-Spam filter has become a must have software for almost all PC users.