Exchange 2K Email Queue

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Microsoft Exchange
All- I have been having issues sporadically with our email queue. I am running Exchange 2000 (sp3) on a Windows 2000 Sever machine. I have all the latest security/critical patches and the hardware should be more than enough to satisfy our demand/load. We do several mass emails a month on behalf of our clients to the tune of 400-4000 recipients with sizes of up to 2MB. We use an application developed in-house to create these mass messages and then relay them through the exchange machine. Every 7th or 8th time we do one of these mass emails, our outgoing Exchange SMTP queue will stall and Outgoing mail will either go really slowly or not at all. I have used exchange system manager to locate the oldest message(s) and purge them and have also used restarting the MTA Stacks service as a troubleshooting measure. It usually is the case though that I wind up rebooting the Exchange server and 9 times out of 10 this is fixed. I have tried to make sure that these email "blasts" go out late in the day in case we have problems, and also religiously reboot all of my servers on a 2 week schedule. Unfortunately for us, sometimes our clients demand that information get out to their audience on their schedule, not mine. I have done a good bit of research on Google Groups and the Knowledge Base, only to find that no proposed solutions really work for my situation. I will say that I don't think the problem lies with our in-house application but with Exchange. I have read that this is a known problem but don't have the known answer. Any help is appreciated, and I will be happy to provide additional information as necessary. Thank you, TyG

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I would like to underscore that we DO NOT run a service that sends SPAM of any kind. We are a very reputable contracting firm working for the United States Government.
Thank you.

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  • Ramheka
    Hi there What version are you using EXCH standard or entreprise? if you are using a standard version you might have an issue with your IS size is it can not grow over 16GIG
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  • TylerG
    I should have included my version in the initial question. We are running Exchange 2000 Enterprise Edition.
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  • Stevesz
    There are probably any number of reasons that this may be happening to your outgoing mail. If you use an anti-virus scanner that checks outgoing mail, this could be a cause in that something in the definition files causes it to hang and not complete scanning. Turn it off if you can and see if the mail is processed then. A content scanner can do the same. It could be any third party application that checks or manipulates outgoing mail. It could even be a combination of them acting at an inappropriate time. This will take some experimentation on your part to discover exactly what is happening. Don't forget to stop and restart the appropriate Exchage services each time you mnake a change. Once the mail starts flowing again, you have found the probable cause, and then can research how to fix it. Steve//
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  • TylerG
    Steve, You make an excellent point. I will try to do some troubleshooting with our virus/spam filter next time we encounter this issue. Thank you kindly for your suggestion.
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