US 12,328,321 B2
Processing external messages using a secure email relay
Ashley Harlow Valeski, Denver, CO (US)
Assigned to Proofpoint, Inc., Sunnyvale, CA (US)
Filed by Proofpoint, Inc., Sunnyvale, CA (US)
Filed on Jan. 16, 2024, as Appl. No. 18/413,496.
Application 18/413,496 is a continuation of application No. 17/306,524, filed on May 3, 2021, granted, now 11,924,224.
Claims priority of provisional application 63/071,411, filed on Aug. 28, 2020.
Prior Publication US 2024/0187421 A1, Jun. 6, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/40 (2022.01)
CPC H04L 63/126 (2013.01) [H04L 63/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computing platform, comprising:
at least one processor;
a communication interface; and
memory storing computer-readable instructions that, when executed by the at least one processor, cause the computing platform to:
receive, via the communication interface, from a message source server associated with a first domain, a first email message;
inject, into the first email message, a DomainKeys Identified Mail (DKIM) signature of a second domain different from the first domain, wherein injecting the DKIM signature of the second domain into the first email message produces a first signed message that identifies itself as originating from the second domain, wherein the first signed message is produced without modifying a Header From domain of the first email message and an Envelope From domain of the first email message;
scan content of the first signed message, wherein scanning the content of the first signed message produces first scan results;
validate the first scan results; and
based on validating the first scan results, send, via the communication interface, to a message recipient server, the first signed message, wherein sending the first signed message to the message recipient server causes the message recipient server to validate the DKIM signature of the first signed message and determine, based on validating the DKIM signature of the first signed message, that the first signed message passes Domain-based Message Authentication, Reporting and Conformance (DMARC) with respect to the second domain.