Doubtful that your ISP would fess up, but I would check to see if they were having problems.
>>>-----Original Message----- >>>From: Smith, Ronni [mailto:[EMAIL PROTECTED]] >>>Sent: Wednesday, December 12, 2001 3:52 PM >>>To: Exchange Discussions >>>Subject: Mysterious outgoing smtp hiatus [long] >>> >>> >>>I've twice now seen a mysterious hiatus in outgoing SMTP >>>mail and I am wondering if anyone has seen it before and >>>especially if anyone knows why it happened/happens and how >>>to make it not happen again. I have re-read the faq and see >>>nothing that addresses this. I have searched technet and the >>>archives to the best of my ability but I can't even figure >>>out if the keywords I am using are the ones that will get >>>the answer. I don't recall reading about anything similar >>>other than the new mail notification thing and this is not >>>that although it might be related. This query is somewhat >>>long since I didn't want to leave out pertinent info and I >>>am not sure what is not pertinent so I'll say sorry for the >>>length ahead of time. >>> >>>We have a single NT4 domain with a single Exchange 5.5 SP4 >>>server and all clients are Outlook 2000 although some are >>>NT4 and some are Win2k. I'll give the problem statement >>>chronologically for want of a better method: >>> >>>We moved our offices to a new (to us) building over the >>>Thanksgiving weekend. We got our T1 switched to the new >>>building on the Wed before Thanksgiving so that night I >>>moved over our BDC and our Exchange server and hooked them >>>up. Mail flowed in (as evidenced by the Trend real time >>>scanner listing messages clearly from this list among >>>others). I was happy. I went home. On the Friday the movers >>>moved over our PDC and all the other servers and desktops >>>and I got the PDC (and some other unrelated servers) up and >>>everything looked fine. Saturday I went to test outgoing >>>mail and noticed it didn't arrive in spite of my giving it >>>plenty of time and trying multiple unrelated offshore >>>(meaning outside like yahoo) addresses. But it wasn't stuck >>>in either the IMC outgoing queues nor the client's outbox >>>(in fact it was in sent items) either. I thought maybe there >>>was an issue because my client (NT4) machine had been up >>>before the PDC so I rebooted my client machine and tried >>>again. No joy. I turned up logging on the Exchange server to >>>the max. I tried again. Same thing. No mail arrived at my >>>offshore accounts and interestingly nothing (nada, zip, etc) >>>in the logs or queue or outbox. I had another person try >>>using their machine (Win2k) thinking perhaps I had a mailbox >>>or client software or profile issue. Nada. I noticed that an >>>NDR that had been in the outgoing queue went out and sure >>>enough in the logs I could see the connection made to the >>>foreign server and the message going out. "Aha", I thought, >>>"Maybe there was some sort of issue with the client not >>>being authenticated" because the Exchange server had been >>>brought up before the PDC and since I had relaying >>>prohibited except for clients that authenticate perhaps that >>>was the issue. I don't know enough about rpc communication >>>and/or the authentication process to figure out which >>>services I might be able to restart to get that going >>>properly again so I rebooted the Exchange server. Poof >>>magically my offshore account had all the test messages in >>>it. "Aren't I a clever monkey" I said and was mostly content >>>(I don't like not knowing what happened but I thought I had >>>a general idea and made a mental note not to separate my >>>Exchange server from its PDC for that long ever again) and >>>didn't worry about it anymore because I had many other >>>issues associated with the move to work out. >>> >>>But then last week it happened again for a hour or so (so >>>much for clever monkeys). But this time it magically got >>>better all by itself! I _hate_ it when that happens. Because >>>things just don't magically happen really. But I am at a >>>loss to figure out why it happened or how to prevent it or >>>even what _it_ really was. If it never happens again I guess >>>I could get away with not caring but since it happened twice >>>I don't have any confidence that it won't someday happen a >>>third time. And I don't want it happening sometime when the >>>mail has to get out with $ at stake or something. >>> >>>I had never seen this before we moved to our new building >>>although I don't believe that is directly pertinent but >>>possibly as a secondary cause or something. Or possibly I >>>just didn't notice it before. All the servers are the same >>>machines as is the router and firewall. We have new wiring >>>and new switches (same manufacturer but 100Mbps vs 10Mbps) >>>and the only thing I can think of is the switches might be >>>doing something and the reboot I did of the Exchange server >>>the first time this happened coincidentally happened at the >>>same time as it would have magically gotten better by itself >>>anyway. But that doesn't make me any more confident. I will >>>look into whether or not the switches might have something >>>to do with it but in the mean time... >>> >>>Any ideas? Or suggestions? Or keywords to search for? >>> >>>Many many thanks for reading this far. All responses >>>gratefully received. >>> >>>Ronni >>> >>>_________________________________________________________________ >>>List posting FAQ: http://www.swinc.com/resource/exch_faq.htm >>>Archives: http://www.swynk.com/sitesearch/search.asp >>>To unsubscribe: mailto:[EMAIL PROTECTED] >>>Exchange List admin: [EMAIL PROTECTED] >>> _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
