Short description of Spam Sleuth Enterprise 5.0: Spam Sleuth Enterprise resides on your e-mail server and screens out spam before it reaches your server. Includes a Web and/or PC client application that allows users to configure spam settings and view all spam messages received. Email Stamps: Requires senders to pay a fee via PayPal before message will arrive in your inbox. Turing Test: Requires senders to enter a validation code before email will arrive in your inbox.