Not receiving emails when TLS setting for email relay is set to "Required Verify".
Trailblazer Community

Known Issues · Fixed

Not receiving emails when TLS setting for email relay is set to "Required Verify".

Last updated 2020-01-07 ·Reference W-3288894 ·Reported By 40 users

Fixed - Winter '20

Summary
Not receiving emails when TLS setting for email relay is set to "Required Verify". The error on the email logs is:

"451 4.7.5 [internal] remote node SSL Certificate not signed by a valid CA"

Possibly DigiCert Global Root G2 CA cert. (or another CA) are not in the MTA's list of supported CA's which is causing this issue.

Repro
1.Sent email
2.Error :451 4.7.5 [internal] remote node SSL Certificate not signed by a valid CA"

Workaround
Change as a temporary measure, to keep SSL required turned on but turn off verification.

Reported By (40)

IT Admin Rajesh Ramachandran Sven Kalig Trevor Roy Jakob Bergemann Iwona Chmura Robert Boerlage Melanie Miller Admin entero Admin DE proAlpha Integration Tim Stoffelsen Kid Jansen Lucas van der Ploeg Yasunori Oowada Austin Walls-Barcellos Sajal Sethi N S Jens Künkel Lars Heilemann Minseok Kang Davide Spiezio Nikolaj LETKEMANN Mark Houghton Interface Campanhas Cory Myers Marty Richard Sundaravalli Kasturi PPP Support Mona Singh Martin Novacek Deepak Banthia Matthew Herbert Gabrielle Reckin Chad Anthony AMIT AGRAWAL Arjun Mahendran D K Miguel Serrano Garcia Brian Lavin Bodo Weinknecht

Is it Fixed?

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