Abstract: A system and method for detecting email fraud is disclosed. In one embodiment of the invention, the system includes a collection module for collecting a plurality of bounced email messages originating from an injection source, and a source mining module for determining the location of the injection source. The bounced email messages include a fraudulent status indicator that can be detected to determine that the injection source is sending email messages intended to defraud the recipient users of the email. In another embodiment of the invention, the system for detecting email fraud includes a honeypot module for attracting email messages associated with an injection source, and a target module for determining the location of the target host, wherein the location of the target host is determined by examining the redirection mechanism.