We had this problem occur again. It appears that the SPAM filter is not the culprit. Ed, as you suggested, it seems to have something to do with NDRs (to SPAMMERS) in the outgoing queues. But the messages build up in the incoming queues. Does anyone know why the outgoing queues, which are far greater in number but also have far fewer messages, cause such a slowdown in the incoming queue?
We seem to be able to solve the problem by deleting the outgoing queues that have the outgoing NDRs. At some point, all of the messages start flowing smoothly. Michele Cooper -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michele Cooper Sent: Tuesday, November 23, 2004 11:18 AM To: Exchange Discussions Subject: RE: Very, Very Slow Exchange 2000 SMTP Queues Thanks for the reply Ed. The messages (in question) are inbound from the internet, not NDRs. They seem to be taking 8-9 hours to get out of the queue. Once they do they are delivered. I removed the SPAM filter from the loop for 90 minutes. It had no effect, so now it looks like it is something to do with the front-end server. As to the placement of the SPAM filter, I am not sure. This is an inherited design. But it seems reasonable. It is configured as a transparent bridge and is only filtering SMTP incoming for SPAM. The Front-End server is inside a DMZ. The Webshield SPAM filter is inside the network. Michele -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Crowley [MVP] Sent: Tuesday, November 23, 2004 11:04 AM To: Exchange Discussions Subject: RE: Very, Very Slow Exchange 2000 SMTP Queues The messages in queue are likely NDRs to undeliverable spam. Why is the antispam server between the front-end and back-end? It should be the first server inbound from the Internet. Ed Crowley MCSE+Internet MVP Freelance E-Mail Philosopher Protecting the world from PSTs and Bricked Backups!� -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michele Cooper Sent: Tuesday, November 23, 2004 6:39 AM To: Exchange Discussions Subject: Very, Very Slow Exchange 2000 SMTP Queues We are running �Exchange 2000 on Windows 2000 with all service packs updated. We have two Exchange Servers � in a front-end / back-end configuration. For the last day and a half, the SMTP Queue from the front-end server to the back-end server has been processing mail extremely slowly. 8 hours is not atypical for a piece of mail to go although some mail goes through relatively �quickly� � ((as in 20 minutes). The queues have a lot of SPAM in them, and I�m not sure whether they is an abnormal amount but since it is the holiday season it could be. We have a McAfee Webshield serving as a SPAM Filter between the two servers, although nothing has changed in the configuration. One thing I have not noticed before are frequent messages sitting in the queues that have no header information � no Message ID, no To, no From, no Subject � completely blank �except that they typically have a size of about 40K. I cannot delete these. Exchange doesn�t give me any options to manage them. I don�t know whether this is related to the slow mail problem I am seeing. Any ideas about how to solve this problem? Thanks, Michele Cooper _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange To subscribe: http://e-newsletters.internet.com/discussionlists.html/ To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. 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