SBS 2003 Exchange refuses connections daily - have to reset IIS

I have a SBS 2003 server running Exchange. I just completed a bunch of windows updates (including .NET framework updates). Since doing this, each morning, I wake up to Exchange refusing inbound connections. I have found the way to solve this is to reset IIS.

I looked through the error logs and can't find anything specifically relating to this, but I could be missing it.

Thoughts?
bezellviAsked:
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Cliff GaliherConnect With a Mentor Commented:
Have you attempted testing SMTP via telnet?
Sometimes Exchange will give textual errors that are not part of the official SMTP protocol so client software can't interpret and report the error properly. If you telnet, you can see what is happening.
 
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Shabarinath RamadasanInfrastructure ArchitectCommented:
Check for the NPP of server.
If NPP reaches above 107 MB, IIS components will start failing.

Good luck
Shaba
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Joshua1909Commented:
When you say refusing inbound connections, do you mean SMTP connections, or connections from your Outlook clients?
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bezellviAuthor Commented:
SMTP connections... clients stay connected, OWA and Outlook.

I'm not sure what NPP is?
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Joshua1909Commented:
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Joshua1909Commented:
It would help if you could enable logging on SMTP:
http://support.microsoft.com/kb/303738
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bezellviAuthor Commented:
Currently, it is at 62,500 K
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Shabarinath RamadasanInfrastructure ArchitectCommented:
Then no need to look at NPP.
What does your http log says?

Good luck
Shaba
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bezellviAuthor Commented:
Can you tell me how to find the specific http log I'm looking for?
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