DSPAM is a scalable and open-source content-based spam filter designed for multi-user enterprise systems. On a properly configured system, many users experience results between 99.5% - 99.95%, or one error for every 200 to 2000 messages. DSPAM supports ma
Yet another antispam software package, this one is real time monitoring that can get a 'feel' for emails as they mutate in real time, and allows for collaborative spam identification
The DCC or Distributed Checksum Clearinghouse is an anti-spam content filter. As of mid-2004, it involves millions of users, tens of thousands of clients and more than 250 servers collecting and counting checksums related to more than 150 million mail mes