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System and method for detecting unwanted content

  • US 9,270,626 B1
  • Filed: 11/17/2014
  • Issued: 02/23/2016
  • Est. Priority Date: 10/09/2012
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, at a server from a first user, an electronic message having one or more addressees;

    comparing a representation of the electronic message to representations of one or more electronic messages previously sent by the first user during a predetermined time period;

    if the electronic message was previously sent by the first user during the predetermined time period, incrementing a message count associated with the electronic message;

    if the electronic message was not previously sent by the first user during the predetermined time period, storing the representation of the electronic message;

    updating a message uniqueness metric in a manner depending on whether the electronic message had been sent previously during the predetermined time period;

    wherein the message uniqueness metric reflects a percentage of electronic messages sent by the first user during the predetermined time period that were unique;

    comparing the updated message uniqueness metric to a threshold message uniqueness value indicative of distribution of unwanted content;

    determining, based on the comparing of the updated message uniqueness metric, whether the electronic message contains unwanted content;

    delivering the electronic message if the updated message uniqueness metric indicates that the electronic message does not contain unwanted content; and

    refraining from delivering the electronic message if the updated message uniqueness metric indicates that the electronic message contains unwanted content.

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