The message could not be delivered because the recipient's email system returned an error. Please review these details: Recipient: ...

The message could not be delivered because the recipient's email system returned an error. Please review these details:

Recipient: {Recipient}
Email server name: {DestinationMailServer}
Technical error message: {MessageDetail}

To fix the problem, we recommend that you check the recipient's email admin about the error.

Contacting support won't resolve this issue because it's due to a problem that's outside the Office 365 service.

Note, we sent a non-delivery report to the sender that gives the details about why the message couldn't be delivered.