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Exchange Server not delivering emails

Hi,
 
I have SBS2011 / Exch 2010. Users have Outlook 2010.
Suddenly users are NOT getting emails(both internal & external). So I send an email to myself in my outlook and it does not get delivered. No bounce-back email either. I checked "Develiry Confirmation" on my test email, but get no confirmation.

In Services.msc, all exchange related services are up and running. I even rebooted SBS2011 and disabled Symantec EndPoint Proection Anti-virus software on SBS as well, but to no avail.

Users can bring up Outlook 2010 and run OWA (https://remote.domain_name.com/owa/).

Can you help?



Where should I look to troubleshoot this issue?


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sglee
Asked:
sglee
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1 Solution
 
David AtkinTechnical DirectorCommented:
Hello,

How much free disk space is available on the server?

Check the event logs for errors. Also check the Exchange tracking logs (toolbox) to see whats happening to the mail.
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sgleeAuthor Commented:
@David
"How much free disk space is available on the server?" --> I saw Less than 2GB out of 700GB total space. It is two month old server, so I never thought that I would run out of HD space.
Anyway I removed some backup files from one folder and now it has 265GB free space.
Should I reboot the server for exchange to recognize the free space?
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David AtkinTechnical DirectorCommented:
It should recognise it automatically. If it is still struggling then restart the Exchange Transport Service.

Run an SMTP test on mxtoolbox.com.  If it shows 'Insufficient Resources' then it hasn't seen the free space yet.

Also, your backups don't want to be on your main drive, that's a disaster waiting to happen.
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sgleeAuthor Commented:
"It should recognise it automatically" --> yes it started working immediately.
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David AtkinTechnical DirectorCommented:
Perfect.  Keep an eye on your disk space, its a common issue.  Exchange will want at least 4GB of free disk space or will stop accepting incoming mail to avoid using all resources.

How are you doing your backups?
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sgleeAuthor Commented:
Thanks for the information regarding Min. 4GB free space for Exchange.
What happened was this:
We have a Legal software with 90GB of Data. I crate a daily backup to C:\Backup Folder and MOVE that to external USB HD attached to the workstation PC. But over the weekend, the building lost power, so users turned their computers on, but no one turned on "Backup PC" where external USB HDs are attached to. Therefore, SBS2011 could not remove 90GB of Daily backup files off its hard drive. Now with about 4 days of backup files (360GB) in C:\Backup folder, the server completely ran out of space.

I erased all but 2 days worth of backup and I am going to move them to external USB this evening.

Thanks for your help and I appreciate it.

Fyi, the user just told me that she saw "RED" color on all mapped drives in her "My Computer".
I told her to contact me immediately when she sees that because it is an indication that HD is running out of space on the server.
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David AtkinTechnical DirectorCommented:
No problem.  Glad the issue is resolved.
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