| 摘要 |
A method and apparatus for identifying 419 messages in a live message stream whereby an incoming message in a live message stream is subjected to an anti-spam pipeline made up of multiple anti-spam stages or filters including a whitelist filter stage, a dynamic feedback-based heuristic filter stage, a 419 text-based heuristic filter stage, one or more metadata creating heuristic filter stages, and a metadata analysis stage. A message is removed from the live analysis of the anti-spam pipeline at any stage where the message is identified as either a potential 419 message or a potential legitimate message. Consequently, processing costs are minimized since no resources are used on messages that have already been classified as either a potential 419 message or a potential legitimate message. In addition, even when a given message is processed by the entire anti-spam pipeline, and the costs are incurred, the information obtained by the application of the entire anti-spam pipeline is used to supplement or update the dynamic feedback-based heuristic filter stage. Consequently, the cost of applying the entire anti-spam pipeline to a message is potentially offset by the valuable feedback results that are used to improve future processing speed and accuracy. |
