Unable to block a sender using Microsoft SRS (sender rewriting scheme) address

Products

• Email Security.cloud

Issue/Introduction

This article describes the right step to block a sender by domain or Email address under Anti spam service.

Environment

Email Security.cloud

Resolution

If you have tried to block a sender under Anti Spam Blocked Senders using Microsoft sender rewriting scheme example :  SRS0=XYZ=example.com=[email protected]   This may not be considered a valid entry and original email may still be delivered to the end recipient.  The best approach is to add the original sender domain or Email , example :  [email protected]

Additional Information

More Information about Microsoft SRS :  https://learn.microsoft.com/en-us/exchange/reference/sender-rewriting-scheme

Approved senders and blocked senders lists : https://knowledge.broadcom.com/external/article/161464/approved-senders-and-blocked-senders-lis.html