Hi,

I am experiencing an issue with a transport rule I have set up in my Microsoft 365 tenant. The rule is intended to block emails sent to the domain abc.com and provide senders with a Non-Delivery Report (NDR) explaining that the domain has changed and to email us at xyz.com instead.

However, during testing, I’ve noticed inconsistent behavior:

Some senders receive the correct explanation as intended.Others receive the NDR message as an attachment.A few receive a different kind of NDR that mentions the transport rule rejected the message.

This inconsistency is causing confusion among our contacts, and I would appreciate your assistance in resolving this matter so that all senders receive the correct NDR message as configured.

Thank you for your attention to this matter.

Best Regards,
Janak Khadka

​Hi, I am experiencing an issue with a transport rule I have set up in my Microsoft 365 tenant. The rule is intended to block emails sent to the domain abc.com and provide senders with a Non-Delivery Report (NDR) explaining that the domain has changed and to email us at xyz.com instead. However, during testing, I’ve noticed inconsistent behavior:Some senders receive the correct explanation as intended.Others receive the NDR message as an attachment.A few receive a different kind of NDR that mentions the transport rule rejected the message.This inconsistency is causing confusion among our contacts, and I would appreciate your assistance in resolving this matter so that all senders receive the correct NDR message as configured.Thank you for your attention to this matter.Best Regards,Janak Khadka  Read More

​