All mail sent from our exchange 07 server to the att.net domain is coming back Queue Expired 550.4.4.7
The mail cannot get through for some reason. I have checked all blacklists and we're not on any of them.
I am new to Exchange 07, but I know the previous version of Exchange one could create Smart Host connectors for sending that helped alleviate this problem. Can I create these smart connectors in Exchange 07? Would it help in this instance?
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