Forum Discussion
Getting “Delivery has failed to these recipients or groups” on every received email
That's usually an issue with missing/invalid legacyExchangeDN and/or an outdated entry in the Outlook name cache. If the issue happens when you reply to old messages, the best thing to do is add the old legacyExchangeDN as X500 address as detailed here: https://support.microsoft.com/en-us/help/2807779/imceaex-non-delivery-report-when-you-send-email-messages-to-an-interna
If it happens for new messages as well, delete the name cache entry and send a message by either selecting the object directly from the GAL or typing the full email address, without completing it.
Hi Vasil, thanks for the suggestion. The issue happens with all messages our email address receives, regardless of whether we have emailed that address before or not.
I deleted the name cache registry, but it's still happening.
Any other help would be appreciated.
Many thanks,
Saxon.
Run a message trace, it should give you more insight on what happens: https://technet.microsoft.com/en-us/library/jj200712(v=exchg.150).aspx
