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Error '550 5.7.12 RESOLVER.RST.SenderNotAuthenticated' in bounced email

Fecha de publicación: Apr 14, 2023
Descripción
Sometimes when an email is sent from Salesforce to an Office 365 Distribution group, the user that sent or triggered the email gets a bounced email with the following error code:

Remote Server returned '< #5.7.12 smtp;550 5.7.12 RESOLVER.RST.SenderNotAuthenticated; Delivery restriction check failed as sender not authenticated>'

This happens when the Distribution Group is not allowed to receive emails from outside the organization. 
Solución
  • This is not a Salesforce issue.
  • Users should change the email server settings to allow the Distribution Group to receive emails from outside the organization.
  • Contact your email admin or internal IT for help with changing the settings.

Related article from Microsoft: Distribution groups
Número del artículo de conocimiento

000386749

 
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Salesforce Help | Article