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SBS 2011 Exchange Stopped Receiving E-mail

Hi, I've got a nightmare situation where a client's new (21 days old) SBS 2011/Exchange Server is no longer working.

DNS is correct. RBL checks are all green. Exchange Transport is on.
Restarting transport does nothing.
Restarting the server allows e-mail within the domain but not from outside.

I have issues against SHAREPOINT. Other users have commented on this but don't know if relevant.
Server running at 2% processor load and 50% memory.

Any ideas?

Ed
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edhasted
Asked:
edhasted
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1 Solution
 
Alan HardistyCo-OwnerCommented:
Please visit www.canyouseeme.org and test port 25.  Do you get SUCCESS?

Have you checked your MX records are pointing to the correct IP Address?  Check your IP at www.whatismyip.com - make sure it tallies with your MX record(s) on www.mxtoolbox.com

Are all your Exchange Services Started?
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edhastedAuthor Commented:
Thanks for the speedy response. It's somehting more subtle. I'd checked those.

IP is correct. MX record is correct. Port 25 open.

Ed
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edhastedAuthor Commented:
I can send e-mail out, the problem is with e-mail in.

Ed
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Alan HardistyCo-OwnerCommented:
Can you divulge your domain name to allow me to run a domain report and hopefully spot something very obvious?  I can hide it once posted, or you can email it to alan @ it-eye.co.uk if you like.  It should speed up a resolution.
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edhastedAuthor Commented:
Here's a clue that implies somehting isn't right from:

https://www.testexchangeconnectivity.com/


      ExRCA is testing Exchange ActiveSync.
       The Exchange ActiveSync test failed.
       
      Test Steps
       
      Attempting the Autodiscover and Exchange ActiveSync test (if requested).
       Testing of Autodiscover for Exchange ActiveSync failed.
       
      Test Steps
       
      Attempting each method of contacting the Autodiscover service.
       The Autodiscover service couldn't be contacted successfully by any method.
       
      Test Steps
       
      Attempting to test potential Autodiscover URL https://domainname.org/AutoDiscover/AutoDiscover.xml
       Testing of this potential Autodiscover URL failed.
       
      Test Steps
      Attempting to test potential Autodiscover URL https://autodiscover.domainname.org/AutoDiscover/AutoDiscover.xml
       Testing of this potential Autodiscover URL failed.
       
      Test Steps
      Attempting to contact the Autodiscover service using the HTTP redirect method.
       The attempt to contact Autodiscover using the HTTP Redirect method failed.
       
      Test Steps
      Attempting to contact the Autodiscover service using the DNS SRV redirect method.
       ExRCA failed to contact the Autodiscover service using the DNS SRV redirect method.
       
      Test Steps
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Alan HardistyCo-OwnerCommented:
When I run a domain report, I get this:

ERROR:
mail.domainname.org's MAILFROM <>
response: 452 4.3.1 Insufficient system resources .<br />
ERROR: mail.domainname.org's MAILFROM <>
response: 452 4.3.1 Insufficient system resources .<br />

This leads me to my article, which talks about lack of disk space or system resources:

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_4259-Exchange-2007-2010-Backpressure-Quick-Fix.html

You have discovered the "backpressure" feature of exchange!!
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edhastedAuthor Commented:
Alan you are spot on. Down to 4Gb of space.

I have turned the Circular Logging but get a message of:

The command completed successfully but no seetings of the 'Mailbox Database' have been modified.
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edhastedAuthor Commented:
Am using the Exchange 2010 part of your notes:

You say "Once you have tidied up your drives and freed up disk space" but what Exchnage commands am I meant to execute to do this.

Now down to 3.5GB and getting worried.
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Alan HardistyCo-OwnerCommented:
You need to look for files that are eating up your disk space (IIS Logs are a major culprit and WSUS IIS Logs), then delete those files ir foyu don't need them.

IIS Log files are found in C:\inetpub\logs\LogFiles - check each folder and see how much wasted space there is being eaten up by log files.  I personally disable the logging for the default website and WSUS as I have never looked at a log file since installing SBS 2011 for various customers since it was first released.
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edhastedAuthor Commented:
Spot on!
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