Unable to Approve an external sender when they use Sender Rewriting Scheme (SRS) or Bounce Address Tag Validation
Article ID: 452469
Updated On:
Products
Issue/Introduction
This Article describes a scenario when an external sender is using the Sender Rewriting Scheme (SRS) or Bounce Address Tag Validation, Email Security.cloud client is not able to bypass the Anti-spam or Image control service due to the ENV From changes.
Environment
Email Security.cloud
Cause
The original ENV from address has been rewritten via SRS after the mail forward or due to Bounce Address Tag Validation, hence the final ENV from address after this process will look like this example : [email protected]
Resolution
Email Security.cloud clients are recommended to Track and Trace the rewritten address and add it to the Approved Senders list of the Impacted service In order to bypass it.
Additional Information
About Sender Rewriting Scheme (SRS): https://learn.microsoft.com/en-us/exchange/reference/sender-rewriting-scheme
About Bounce Address Tag Validation : https://en.wikipedia.org/wiki/Bounce_Address_Tag_Validation?PHPSESSID=00d4ef55c6b9e1869139870ef705b69c
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