Bongosoft AntiSpam 2004 eliminates spam once and for all in an easy-to-use, client-based product. Using patent-pending technology, it automatically authenticates the SENDER of each email. There are no rules to configure and no need for filter updates. During installation, your email address book is imported by Bongosoft AntiSpam to form a foundation of “allowed” senders. If an email arrives from an unknown sender, Bongosoft AntiSpam automatically send a “challenge” message to that sender asking them to “respond” with your AntiSpam Passcode. The AntiSpam Passcode is sent along with the “challenge” message in a graphical file. When the “response” message is received and the passcode is found to be correct, that sender’s original email and all subsequent email from that sender are passed to your inbox.