07219131 is referenced by 89 patents and cites 98 patents.

Message delivery approaches in which senders define filters with associated actions for evaluation in relation to specified messages. After creating and storing filters with specified actions, senders dispatch messages to a processing system, which evaluates the filters against the messages. If a match occurs, the processing system performs the specified actions on the messages. The processing system may send the same message multiple times to different receiving systems, and may modify the source IP address and outbound interface of the message for each receiving system. The source IP address or interface may be modified by a filter in response to external events, such as a receiving system blocking another copy of the message. A single message processing system can appear as a large number of virtual message sendingunits.

Title
Electronic message delivery using an alternate source approach
Application Number
10/347055
Publication Number
7219131 (B2)
Application Date
January 16, 2003
Publication Date
May 15, 2007
Inventor
Patrick R Peterson
San Francisco
CA, US
Peter Schlampp
San Francisco
CA, US
Paul Clegg
San Mateo
CA, US
Scott Banister
Pacifica
CA, US
Agent
Christopher J Brokaw
Hickman Palermo Truong & Becker
Assignee
IronPort Systems
CA, US
IPC
G06F 15/16
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