Delivery has failed to these recipients or distribution lists
I need help to fault find the below please, I am using SBS 2008 and would like to understand the below:
This was the returned email details
You are not allowed to send this message because you are trying to send on behalf of another sender without permission to do so. Please verify that you are sending on behalf of the correct sender, or ask your system administrator to help you get the required permission.
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