Spam Filter ISP - SpamFilter is used by ISPs and companies running their SMTP servers. It is designed to be a proxy to your incoming SMTP server receiving all e-mails addressed to your domain. If the sender's IP is not blacklisted in DNS-MAPS based black lists then the e-mail is forwarded to your SMTP server. Statistical Bayesian DNA fingerprinting, along with dozens of blacklist/white rules are also be applied to filter spam. RegEx (Regular Expressions) filters can be applied to almost any filter. End users even have Web access to their quarantined e-mails. They can view, delete, and force delivery of their own quarantined e-mail without having to ask the system administrators. This version is free for development/test servers. A license is required for use in a production environment.