Mail routing settings for the domain '{0}' aren't set up correctly. We couldn't find A records for each MX record. To fix ...

Mail routing settings for the domain '{0}' aren't set up correctly. We couldn't find A records for each MX record. To fix it, you need to contact the owner of '{0}' because that domain isn't part of your Office 365 environment. For information that could help them, click the 'Get help fixing this issue' link on the right side of the screen.