Brightmail Tries to ID Spam Sources

The Brightmail Reputation Service, monitors hundreds of thousands of e-mail sources to determine how much mail sent from these addresses is legitimate and how much is spam. The company gathers information from user reports and from its Probe Network — a collection of decoy e-mail in-boxes designed to catch spam — to determine whether a given IP address sends valid or junk messages. The service creates a profile of each e-mail source from which administrators can decide whether to block mail from these sources or allow it into the company. Brightmail also will make available a safe list of e-mail addresses that have never sent spam to users of the Reputation Service free of charge