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Solution home SMTP Relay Outbound SMTP

TLS Certificate Validation Failure Error Print

Modified on: Fri, 11 Nov, 2022 at 5:17 AM


The Sectigo intermediate root these new certificates use is from November 2018, so if the sending system is older and hasn't updated its trusted roots bundle then it won't trust this certificate.

For "454 4.7.5 Certificate validation failure" Error - please refer to https://support.sectigo.com/articles/Knowledge/Sectigo-Intermediate-Certificates


Ticket reference :  https://support.duocircle.com/a/tickets/403951


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