Event ID 2013 on Exchange server saying SMTP could not connect to DNS server

We are getting a message in our Exchange 2003 Enterprise server saying Event ID 2013 on Exchange server saying SMTP could not connect to DNS server.  We we clink on the more information link we get a message saying "Windows cannot Help and Support because service is not running and start the service."  We look for the service to start and it is not listed.  Any assistance offered for this would be appreciated.  
regsampAsked:
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Suliman Abu KharroubIT Consultant Commented:
dns client service is not started or listed?
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Suliman Abu KharroubIT Consultant Commented:
did you tried to restart the server ?
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regsampAuthor Commented:
Have not tried to restart the server.  We do have e-mail flow currently.  DNS client service is listed and started.  
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LLMorrissonCommented:
Do you have any performance stats from your DNS server? Is it struggling with requests due a large number of NDRs trying to be sent to non-exisitant email addresses generated by spammers? Have you checked your queues? Anything stuck in retry anywhere?
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dolbyhomeCommented:
in services - SMTP is not listed under Microsoft Exchange.... it is its own entry under Simple Mail Transport Protocol - are you sure it is not listed ?
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regsampAuthor Commented:
Queue looks good.  Nothing stuck in retry.  SMTP is listed.  We were referring to the Help and Support message saying to check the service.  That is not listed.  No performance stats from the server.  We just noticed the issue.  Nothing stuck in queue/retry and e-mail flow seems good.  
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Suliman Abu KharroubIT Consultant Commented:
check NIC properties--> DNS ips? are all of them work fine ?
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dolbyhomeCommented:
if you change your DNS to 8.8.8.8 (google DNS servers) - does the SMTP mail go ?
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regsampAuthor Commented:
"check NIC properties--> DNS ips? are all of them work fine"  These do look good.  
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regsampAuthor Commented:
@amitkulshrestha
Followed the link and checked this and we have done all this.  "What you should have is internal IP addresses ONLY in the DNS configuration of the network interface. The domain controllers should point to themselves as primary and each other as secondary. Don't use 127.0.0.1 as the IP address, but their real IP address. If you have problems with DNS resolution, then configure the ISPs DNS servers on the DNS server applet as a forwarders.
There should be NO external DNS servers listed anywhere in the basic network configuration of your clients or servers. " 


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regsampAuthor Commented:
It appears that one of the forwarders ISPs address is wrong and fixing it now and seeing if that helps.  
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regsampAuthor Commented:
The error was reporting every hour but after the forwarders corrected it has stopped.  It may be all set.  Will monitor and then update.
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