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Follow below two links this will help you.<br />
<a href="http://support.microsoft.com/kb/884421" rel="ugc nofollow">http://support.microsoft.com/kb/884421</a><br />
<a href="http://support.microsoft.com/kb/924251" rel="ugc nofollow">http://support.microsoft.com/kb/924251</a>
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Follow below two links this will help you.
http://support.microsoft.com/kb/884421 [http://support.microsoft.com/kb/884421]
http://support.microsoft.com/kb/924251 [http://support.microsoft.com/kb/924251]

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This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
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This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.

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I am still having trouble with certain emails sticking in our SMTP queue on our Exchange 2003 server. &nbsp;Our MX Records and reverse DNS all look good and we are not an open relay.<br />
<br />
the errors I am getting are:<br />
<br />
Unable to bind to the destination server in DNS<br />
<br />
The remote server did not respond to a connection attempt<br />
<br />
Most email is going out without a problem, but some are delayed and some never go.
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I am still having trouble with certain emails sticking in our SMTP queue on our Exchange 2003 server.  Our MX Records and reverse DNS all look good and we are not an open relay.

the errors I am getting are:

Unable to bind to the destination server in DNS

The remote server did not respond to a connection attempt

Most email is going out without a problem, but some are delayed and some never go.

Unable to bind to the destination server in DNS, Some Emails Stuck in Queue

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.