System and method for verifying delivery and integrity of electronic messages

  • US 7,966,372 B1
  • Filed: 07/27/2000
  • Issued: 06/21/2011
  • Est. Priority Date: 07/28/1999
  • Status: Expired due to Term
First Claim
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1. In a method of transmitting a message from a sender to a recipient through a server displaced from the recipient and of authenticating the message, the steps at the server of:

  • receiving the message from the sender,transmitting the message to the recipient,storing at the server at least a portion of a mail transport protocol dialog generated by the server and the recipient during the transmission of the message between the server and the recipient,receiving at the server an indication from the recipient that the message has been received at the recipient from the server,maintaining the message and additionally creating a digital signature of the message for later authentication of the message by the server, andtransmitting to the sender the message, the digital signature of the message, and the at least a portion of the mail transport dialog before any authentication of the message for storage by the sender.

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