Other Solutions
Not all spam solutions are created equal. This area contains solutions that don't necessarily fit in a specific category. They may be unique solutions that have no specific categorization, or solutions that use multiple techniques together, thus fitting in many categories.
Open Source Solutions
- Anti-Spam-SMTP-Proxy
- ASSP is a proxy that sits between your mail server and the Internet. It uses a variety of techniques to identify and prevent spam before invoking the actual SMTP server.