question

RogerRoger-2394 avatar image
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RogerRoger-2394 asked emilyhua-msft edited

Delivery has failed to these recipients or groups

Hi All

One of my user is triggering emails to an external user. the user is getting the below NDR messages. This clearly looks to be issue at the external domain side but wanna check if anything needs to be checked at my end and is there any Microsoft article for this error.

office-exchange-server-administrationoffice-exchange-online-itprooffice-exchange-server-mailflow
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1 Answer

MdeRooij avatar image
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MdeRooij answered

It's not on your end. Receiving infrastructure (server) did not accept your mail as the recipient doesn't exist there. If it does exist, they maybe have a (recipient) filtering / routing problem

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