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SMTP queues building up on Hub Transport server

Hi

We are running Exchange 2003/Exchange 2007.

On one of our Hub Transport servers, the queues are starting to increase. I can't see anything in the Event Log to indicate why.

Can anyone recommend any form of troubleshooting to ascertain why this is?

Also, if we were to reboot the server, I am correct in assuming that either the queues will be flushed (if we clear whatever the problem is), or the mail will remain in the queue? They won't just disappear?

Thanks in advance!
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Joe_Budden
Asked:
Joe_Budden
4 Solutions
 
George SasIT EngineerCommented:
The mail will remain in queue , it will not be flushed.
Have you checked the queue to see what remote domains are in queue ?
Check your DNS settings problem might be there.
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endital1097Commented:
which queues? are they queues for remote domains? you may have a connectivity issue with a smart host (if used).

try to locate the mx record for one of the domains in the queue and connect to it manually
nslookup
set type=mx
hotmail.com

telnet mx1.hotmail.com 25
ehlo yourdomain.com
mail from: you@yourdomain.com
rcpt to: someone@hotmail.com
data
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FDiskWizardCommented:
There is a command line tool from Microsoft I use to check for large attachments that might be clogging the pipes. See below.

If you have Anti-virus for Exchange try stopping it for a sec.... It may be hung on something.

Check_Big_emails.bat:
c:\aqadmcli "msgaction ma=COUNT,flags=SIZE,size=10000000"
c:\aqadmcli "msgaction ma=COUNT,flags=SIZE,size=1000000"
c:\aqadmcli "msgaction ma=COUNT,flags=SIZE,size=100000"
pause

You can also use that command to kill emails from specific users/domains... or to certain users.
It's really great if you ever have an email flood of some sort - trust me :-)



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rr1968Commented:
You can try restarting "MS Exchange transport" Service instead of restarting the HUB server
On the "Queue viewer", what does the last error column say. There should be some error code, that will give more info why the queue is building
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Joe_BuddenAuthor Commented:
thx
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