Getting this error when trying to send an email from an application to internal users. Using Exchange 2010 and Outlook 2010. The app has a mailbox called Order, the person who built the app has manage full access, and sand as permission, added a new receive connector with the IP of the box sending the email
A message that you have sent could not be delivered to one or more recipients. This is a permanent error. The following address failed:
<lee.@domain.com>: 553 Cannot find OUTBOUND MX Records for domain (domain.com)
How to fix?