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Cisco Bug: CSCzv27747 - DMARC outbound - DKIM signing to not use Sender info

Last Modified

Jan 07, 2019

Products (1)

  • Cisco Email Security Appliance

Known Affected Releases

-000 8.0.0-197 8.0.1-023 8.5.6-000 9.7.2

Description (partial)

Recipient system with DMARC enabled considers a DKIM signed email from the ESA as unauthenticated: 5.7.1 Unauthenticated email from is not accepted due to domain

The email has a 'From:' and a 'Sender:' header. By default, the ESA will use the 'Sender:' header for signing when a DKIM profile matches. 

DMARC requires the 'From:' header to be signed.
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