I am going to make a few assumptions based on the info contained in this thread thus far. 1)You have a MS SMTP server configured as a Smart Host for an Exchange 2003 server. In other words, you can install an instance of Exchange as a front end server, and I'm guessing you did not do this. 2)I'm also guessing that on said MS SMTP Smart Host you have relaying restricted to ONLY the domains you list. This alleviates MS "confusion". 3)Anti-Spam operations are being conducted on this SMTP server via GFI software. 4)In the properties of your SMTP Smart Host, you have not enabled logging via the check box, AND included all extended properties. If a time threshold for delivery is not met, it will be logged here. Depending on your volume, place this file where there is ample storage. Also, be sure to check "unlimited file size". Remedy- IMHO, there may be 2 ways to fix this. First, double check your hard coded DNS server on the smart host. I know that in native-mode AD, this should only have your DDNS server listed. Your DDNS server should be configured to make the DNS call if it doesn't have it in cache. I ran into this at the WS level. What happened was a latency with regards to delivery that lasted anywhere from 30 minutes to several days. Second, MS IIS SMTP is MICROSOFT! Build an EXACT duplicate box, configured exactly as the box you now have. Give it a test run between say 8-10 pm on a slow night. I'll bet that fixes it. Be sure ALL logging is enabled via the SMTP properties page, including extended properties. I'm guessing your build may be bad, or over time it has degraded. Hope that helps. gb
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Tony Hlabse Sent: Monday, November 10, 2003 10:23 AM To: Exchange Discussions Subject: Re: smtp receives but stops sending Only thing that comes to mind is a disk space issue. Will listen to see what the final outcome is. From: "Mark Dewell" <[EMAIL PROTECTED]> Reply-To: "Exchange Discussions" <[EMAIL PROTECTED]> To: "Exchange Discussions" <[EMAIL PROTECTED]> Subject: smtp receives but stops sending Date: Mon, 10 Nov 2003 16:56:51 -0000 Can anyone shed any light on the following behavior. We are running Exchange 2003 and during normal operation the smtp queues will be empty (apart from the occasionally message or 2 in transit). However, once or twice a week the smtp service on our front end server seems to stop delivering messages, but does continue to accept them, with the result that if left unchecked we get a backlog of thousands of messages in the 'Messages pending submission' queue. To resolve this we have to restart the smtp service, which is normally not possible. So we instead have to set the service to 'disabled' and then restart the entire server. The queue contents can then be moved out to a temporary location and the smtp service restarted. If we restart without clearing the original queue contents the IIS service often crashes, but if we start up with an empty queue we can feed the backlog back into the system a thousand at a time via the pickup folder and this will successfully deliver them. So this seems to imply that it is not the queue/message content that is causing the problem. We originally saw this problem with Exchange 2000, but successive service packs and now Ex2003 have not fixed the problem. It only seems to happen at busy periods, like the Autumn term of a University. It ran without a hiccup over the summer break. We have a very fast network with several AD global catalogs available so I don't believe this to be an active directory related problem, but..... We are also running GFI MailEssentials on this server, but only since June and the problem has been occuring on and off for the last couple of years. Sophos Mail Monitor Anti-Virus also runs on this and all our other Exchange servers, but only this one front end server has the problem. Is anyone having a similar problems? Any ideas how we can investigate this further (The events logs show no errors during the time period this occurs). ---< Mark Dewell, University of East London, Dagenham, Essex, UK >--- ---< Email : [EMAIL PROTECTED] >--- ---< URL : http://homepages.uel.ac.uk/1278 >--- < Practice random kindness and senseless acts of beauty (Anne Herbert) > _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ MSN Shopping upgraded for the holidays! Snappier product search... http://shopping.msn.com _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
