Bongosoft AntiSpam 2004 (BAS) is an intuitive, easy-to-use, client-based software product that eliminates spam forever from your computer?s email system. It uses 'Passcode Authentication? technology, a patent-pending, active-filtering algorithm, to authenticate the sender of each incoming email message. Bongosoft AntiSpam works with all current Windows operating systems and supports email programs such as Outlook, Outlook Express, Eudora, Netscape or any other POP3 email application. Bongosoft AntiSpam 2004 is guaranteed to eliminate all spam, keeping your inbox clean.