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5.7.1 Delivery not authorized, message refused ##Exchange 2007

navin_peddi asked

one of our user send a mail to group of receipients but he received an error "5.7.1 Delivery not authorized, message refused ##" from HUB transport server. I checked it in message tracking tool and the Event ID is showing as FAIL. I also check his storage quota limits. They are fine. What seems to be the issue.
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Mahmoud SabrySenior IT Systems Engineer
is this message between internal users or from internal to external user (another email server externally)?


the problem was that user tried to send an attachment which was more than permissable limit. we have transport rule created for the users who can send attachments to a defined limit. We included the User's ID in it. Issue resolved.