A mail account on a Windows/Exchange 2003 server is getting flooded with NDR reports. The server comes clean as a non-relay and the NDR's are coming in from all over. How is the best way to block this?
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To show how to create a transport rule in Exchange 2013. We show this process by using the Exchange Admin Center.
Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center.
Navigate to the Mail Flow >> Rules tab.: To cr…