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Exchange Queue Message

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.
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1 Solution
That host resolves to this:
That address is not blacklisted in any of the public blacklists. Therefore you will need to speak to the remote side to find out why.

Looks like someone is using your email address as reply address, probably in a spam message. If it's of no concern to you, you can ignore it. It will most likely cease to arrive more in a few days.
emerson625Author Commented:
I think you might be right about that but i have some 15 messages affected by this. So how then do i get the messages delivered? Should I use a smarthost that will deliver them?
Thought you didn't know the recipient domain, why do you want to deliever them? Did you or someone compose them? In that case the quick fix is to send them from another host like hotmail. Smarthost might work if it has another IP address, preferrably another net altogether.

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