RE: Email Queue Error
- From: v-chacez@xxxxxxxxxxxxx (chace zhang)
- Date: Thu, 09 Nov 2006 05:15:39 GMT
Hi,
Thank you for posting here.
From your post, I understand you experience networking performance issue ata certain period. If I'm off base, please do not hesitate to let me know.
Please note that we are happy to work with you on performance issues here,
but they can be lengthy to resolve in the newsgroups. Thanks for your
understanding.
Based on my experience, the value "SMTP Server Remote Queue Length"
indicates the number of messages in the SMTP queue for remote delivery. By
default, the value set in Exchange 2K3 is 30. If you receive the alert,
that means the average value for Remote Queue Length in 10 mins is greater
than 30 which means the number of emails waiting to be delivered in the
"Remote Delivery" queue is above 30.
When did you receive this alert for the first time? Are there any mail flow
issues? Have you configured the Internet access and e-mail by using the
CEICW? Are you using DNS or a smarthost to deliver outbound e-mail?
If your clients do send many e-mails, it is a normal behavior and you can
change the thread in Server Management \ Monitoring and Reporting \ Change
Alert Notification \ Performance Counters. You can Edit the entry "SMTP
Server Remote Queue Length" and replace the default threshold with the
average for that system (plus some padding, generally, we can use the
130%~140% average value as the threshold.)
If the users on your network do not send e-mails as many as the number
indicated in the alert, I would suggest that you check the contents of the
queued e-mails:
1) Open up ESM (Exchange System Manager), and then expand Servers \ Server
name \ Queues.
2) In the right pane, double-click the queue which has stuck e-mails, and
then click Find Now.
3) Double-click the items listed in Search Results to bring up Message
Properties, what's displayed in Sender column?
Under a normal situation, the Sender column should show only your own SMTP
domain. If there are many e-mails from other Internet domains, your
Exchange server may be relaying e-mails. Refer to the following Knowledge
Base article for the information about blocking SMTP open relay:
324958 HOW TO: Block Open SMTP Relaying and Clean Up Exchange Server SMTP
Queues on SBS
http://support.microsoft.com/?id=324958
If there are many e-mails are From postmaster@yourdomain or "<>" To
Internet recipients, it is likely some kind of NDR attack. Refer to the
following Knowledge Base article for solution:
886208 Exchange queues fill with many non-delivery reports from the
postmaster account in Small Business Server 2003
http://support.microsoft.com/?id=886208
Furthermore, you may try the following steps to isolate the root cause:
1. Does this issue also occur when users connect to the application server
via RDP from internal?
2. Please reproduce this issue, and can you access RWW or OWA from internet
at this moment?
3. How much bandwidth your Internet connection?
4. If we immediately stop the SMTP service of the SBS server once the issue
occurs with all RDP connections resume to work right away?
Hope this helps, if anything unclear, please do not hesitate to let me
know, I look forward to hearing from you.
Have a nice day!
Best Regards,
Chace Zhang (MSFT)
Microsoft CSS Online Newsgroup Support
Get Secure! - www.microsoft.com/security
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--------------------
| From: "Ascnet" <Ascent@xxxxxxxxxxxxx>
| Subject: Email Queue Error
| Date: Wed, 8 Nov 2006 09:05:21 -0500
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| For each of the last 3 days I have gotten the "SMTP Server Remote Queue
| Length Alert on KCMSBS" email at exactly 8:38 in the morning. My
Terminal
| Server users have also been complaining about slower than normal
| connections. Assuming there's a problem with bandwidth how can I detect
| where the bandwidth leak is?
|
| SBS 2003 Prem (w/o ISA installed)
|
|
|
.
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