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Controlling receipt of undesired electronic mail

  • US 8,495,145 B2
  • Filed: 10/14/2004
  • Issued: 07/23/2013
  • Est. Priority Date: 10/14/2004
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • authorizing a given message transfer agent to make a given maximum number of connections and deliver a given number of messages within a time period;

    determining when the given maximum number of connections has been completed and the given number of messages delivered;

    if so, determining whether a given time period has elapsed since the given number of connections has been completed and the given number of messages delivered;

    accepting a new connection request from said given message transfer agent if the time period has elapsed; and

    otherwise, dropping the connection request to an external message transfer agent and issuing a temporary error code indicating to retry at a sufficiently later time.

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