Exchange 2003 SP2 server has SMTP stop every 2 minutes

We are running Back-end Exchange 2003 SP2 on a Windows Server 2003 SP2.

The SMTP and IIS services are stopping about once every 2 minutes.  We have both services configured to restart automatically.

This started on Friday evening about midnight for no apparent reason.

In the c:\windows\pchealth\errorrep\userdumps, files are appearing for w3wp.exe.

In task-manager,when things are running correctly, the inetinfo.exe process is using about 50 – 90% of the CPU resources.

Actions taken:

We have stopped the services for Symantec Mail Security and GFI mail essentials and the problems mentioned above continue to happen.
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Fletcher-ReinhardtAsked:
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SembeeCommented:
Stopping products like Symantec and GFI are not enough to show whether they are the cause of the problem or not. Due to the way that they integrate with Exchange you need to actually remove the products and reboot the machine. If the problems continue then it is not those that are the cause.

However based on my experience I would only be looking at the Symantec product as the cause.

Simon.
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Fletcher-ReinhardtAuthor Commented:
We have uninstalled Symantec Mail Security and issues are still occurring.
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Fletcher-ReinhardtAuthor Commented:
Could this be caused by a  corrupt message in the queue?
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SembeeCommented:
I would be surprised if it was a corrupt message in the queue causing the message.
You could move all the messages out of the queue and drop them in to the pickup folder one by one to see what happens. If the services are stopping then something should be logged in the event viewer to indicate what is happening.

Simon.
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Fletcher-ReinhardtAuthor Commented:
We had no issues since we cleaned up the message queue on both our front-end and back-end servers.  We have also reinstalled Symantec Mail Security and all is well.
Cased closed for now.
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