Enhanced status code

SMTP error X.7.14

Trust relationship required

Updated Jul 1, 2026

The short answer

Trust relationship required Common cause: Submission server requires configured trust with another service

Quick fix

Configure the required trust relationship

This code is written X.7.14 because the reason is the same whether the failure is temporary (a 4 first digit) or permanent (a 5). Read the first digit of your own bounce to know which applies.

How to fix it

Configure the required trust relationship

Related codes

X.7.0 Other or undefined security status X.7.1 Delivery not authorized X.7.2 Mailing list expansion prohibited X.7.3 Security conversion required but impossible X.7.4 Security features not supported X.7.5 Cryptographic failure
All SMTP error codes
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