Email server name: {0} Email Server IP address: {1} Technical error message: {2} Fix the problem The recipient won't be able ...

Email server name: {0}
Email Server IP address: {1}
Technical error message: {2}

Fix the problem
The recipient won't be able to receive messages until their admin fixes the issue with the server. In the meantime, we recommend contacting the recipient another way.

We'll keep trying to send the message for a total of 48 hours. After that, Office 365 will stop trying to send the message and will return a non-delivery report (NDR) to the sender.