filtering network. Razor establishes a distributed and constantly
updating catalogue of spam in propagation. This catalogue is used by
clients to filter out known spam. On receiving a spam, a Razor Reporting
Agent (run by an end-user or a troll box) calculates and submits a
20-character unique identification of the spam (a SHA Digest) to its
closest Razor Catalogue Server. The Catalogue Server echos this
signature to other trusted servers after storing it in its database.
Prior to manual processing or transport-level reception, Razor Filtering
Agents (end-users and MTAs) check their incoming mail against a
Catalogue Server and filter out or deny transport in case of a signature
match. Catalogued spam, once identified and reported by a Reporting
Agent, can be blocked out by the rest of the Filtering Agents on the
network.
WWW: http://razor.sourceforge.net/
Submitted by Marc Matteo <marcm@lectroid.net>
