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Securing email conversations

  • US 9,560,020 B2
  • Filed: 01/06/2015
  • Issued: 01/31/2017
  • Est. Priority Date: 09/28/2011
  • Status: Active Grant
First Claim
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1. At least one non-transitory machine accessible storage medium having instructions stored thereon, the instructions when executed on a machine, cause the machine to:

  • determine that at least a portion of a transmission of a first email to be sent from a first email account associated with a first mail server to at least a second email account associated with at least one second mail server is to be secured;

    change a first reply-to address in the first email to a substitute reply-to address, wherein the first reply-to address corresponds to the second email account and the substitute reply-to address corresponds to an intermediate device, wherein replies to the first email, directed to the second email account, are to be sent over one or more secure channels to the intermediate device to secure transmission of the replies to the second email server for delivery to the second email account based on the changed reply-to address, wherein the substitute reply-to address comprises a domain portion to direct replies to the intermediate device and a local portion to indicate the second email account, and the local portion comprises an encoding of at least a portion of an address of the second email account to abstract the address of the second email account; and

    send the first email with the substitute reply-to address to the second email account over a secure channel.

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