This message appears mutiple times in the Queue viewer on the exchange server 2007. I seems as thought someone is using my ip address . I am not familar with duke*.*coxmail.com. I need assistants as soon as possible on this one.
451 4.4.0 Primary Target IP Address Responded with 554 dukecmimpi02.coxmail.com is blacklisted. Attempted falover to alternative host but that did not succeed.