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We just bought a domain and added it to our Office 365 tenant. Since then, I (as the admin) have been getting NDR messages sent to ******@mydomain.com . These NDR's are for emails sent to non-existant users from outside senders. It appears that people are still sending messages to users from the former domain owner. That's not a problem. I'm just wondering why I get the NDR's. I don't even have the email address ******@mydomain.com setup.
There is no such standard functionality in EXO.
Exchange on-premises can have admins get a copy of sent NDRs (keyword MicrosoftExchangeRecipientReplyRecipient).
Then why do I continue to get these messages? We are all online with Exchange.
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Hi @26328735
Did you mean the mailbox ******@mydomain.com sent NDR messages, or it received NDR messages?
Did you see it via Message Trace?
Since the mailbox ******@mydomain.com is responsible for sending NDR messages, I suppose this is the expected behavior.
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Yep, still having this issue.
Hi,
Please post a screenshot of the message so we can get some more information.
Don't forget to hide your personal information in it.
What does message tracking show? See if they are any transport rules sending those messages to you
This is what I get, not the sender.
what does Exchange Message tracking show?
https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/message-trace-scc?view=o365-worldwide#:~:text=in%20the%20results.-,Open%20message%20trace,trace%20in%20the%20EAC%20opens.
What rules are being applied to these if any to these messages you get?