Exchange Server 2007 unable to send internal email

mikel948
mikel948 used Ask the Experts™
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Hey,

My Exchange Server suddenly quit sending internal email and we cannot fix it. I am running Exchange 2007 SP1 on Windows 2003 servers which are all VMware virtual machines. I have the functions broken out over three servers, MXstore is one, MXhub transport is one another , and MXClient is on the third. I have been running tis environment for over 2 years without issue. I have not applied any updates to either VMware or Exchange or Windows in the last couple of weeks.

I believe this has something to do with either the MapiDelivery service or DNS or??? because I can send outbound SMTP mail without issue. I receive inbound mail but is just sits in the Mapideliver queue as does internal emails. I have tried stopping/starting transport service, MXStore service, and mail submission service. During the course of these actions, the Mapidelivery queue release a few emails. Sometimes 100 will go sometimes none go. I cannot find any consistent patteren as to why they go or don't.  

I have started examining the DNS and DC replication on my domain but I wanted to put this out to the communitiy for help because M$ won't give me any due to the fact my boxes are VM's.

Thanks in advance for your help.

Mikel948
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Awarded 2009
Top Expert 2010

Commented:
First thing to do is uninstall any SPAM or virus software you have on the machines snd reboot them.

Are there any event log errors that might help?

If you look at the queues do they show an error if so what?
AkhaterSolutions Architect

Commented:
honestly the first thing i would do is run ExBPA and Troubleshooting analyser from the EMC toolbox

Author

Commented:
Demazter and Akhter,

Thanks for the suggestions. I am not running antivirus / antispam on any of the boxes. I have also run EXBPA and Troublshooting analyzer about 100 times. EXBPA comes back clean and the analyzer tells me I have over 50 messages stuck in my queue, which I already knew.
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AkhaterSolutions Architect

Commented:
well if you open the MAPI Delivery Queue and check the status of any of the stuck emails what is it?

Author

Commented:
status for all messages is Ready
AkhaterSolutions Architect

Commented:
a long shot but is the time on your computer correct ?
Awarded 2009
Top Expert 2010

Commented:
No event log errors?
Are all the exchange services on all servers started?

Check that the receive connector on the servers has Exchange Servers under the permission groups checked?
Awarded 2009
Top Expert 2010

Commented:
Also can you ping all the servers by hostname both netbios and FQDN from all servers?

Author

Commented:
Yeah, checked that already. All DC's and exchange servers all have same time. I ran netdiag and dcdiag on all of the servers and everything comes back clean. the really frustrating thing is during a server reboot or occasionally when we stop a service, 1-5 emails get sent from the MapiDelivery queue, so I know that it technical is "working" I have been looking into the idea of back pressure but have not come up with anything.
Awarded 2009
Top Expert 2010

Commented:
Are the exchange servers all dc's?
If so they MUST also be global catalogue servers!

Author

Commented:
none of my Exchange servers are DC's.
AkhaterSolutions Architect

Commented:
have you made sure that windows firewall is not on ?

are all VM on the same host machine?

is your mailbox server low on disk space ?

Author

Commented:
Firewall off. VM's are spread across 3 VMware host servers. I was running into disk space issues but added 100GB to the disk

Author

Commented:
my queues just emptied!
AkhaterSolutions Architect

Commented:
when you added a disk ?

Awarded 2009
Top Expert 2010

Commented:
No disk space will cause the mail to stop floweing between servers.

Commented:
Mikel948 - Is your problem resolved ?
Commented:
Hi,

I finally convinced Microsoft to take my support call because I built an new Exchange 2007 box running on Win2K8 on VMware vSphere 4.0. After 10 hours on the phone they told me my databases were hopelessly corrupted and my last resort was to run an offline defrag. I told them I didn't have the time or space to do that. They were also unable to solve my issue why I could not get the move-mailbox cmdlet to work. I was finally able to move my mailboxes by implementing this solution on my old Exchange Server: http://support.microsoft.com/kb/288894. I hope this helps.

Mikel948

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