Patent ID: 8825769

Claim:
A computer-implemented method for filtering electronic messages, comprising: receiving, by a processor, a message report from a user in response to an electronic message received by the user; calculating a response delay time of the message report from the user for the electronic message based on a difference in time from between when the message report from the user is received and when an initial message report for the electronic message was received; calculating a confidence value based on the response delay time; comparing the confidence value to a plurality of confidence value thresholds; if the confidence value exceeds a first predetermined confidence value threshold, adding the confidence value to a signature value associated with the electronic message; if the confidence value exceeds a second predetermined confidence value threshold, adding a value less than the confidence value to a signature value associated with the electronic message; determining, by the processor, if the signature value exceeds a signature value threshold; and filtering the electronic message if the signature value exceeds the signature value threshold.