Spam Sleuth Lite - Version 4.0 Spam Sleuth Lite, more than a simple filter, monitors your e-mail box behind the scenes and analyzes e- mail messages for spam, virus and Web bug characteristics. Spam Sleuth Lite compresses messages to take as little space as possible on your computer. When your e-mail program gets your e- mail, the spam has already been removed and you can read your e- mail the same way you always have but without sorting through the spam.