The Cisco PIX SMTP fixup was the problem - we shut it off Wednesday afternoon, received a few more duplicates into the evening and then it just subsided. Thanks for the tips! I probably would have chased my tail for a good while on that one...
Jeff -----Original Message----- From: Hague, Jeff Sent: Wednesday, February 02, 2005 4:28 PM To: Exchange Discussions Subject: RE: Update - multiple copies of the same email It is now off - thanks! Ill let you know if it ceases. Jeff -----Original Message----- From: Waters, Jeff [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 02, 2005 4:24 PM To: Exchange Discussions Subject: RE: Update - multiple copies of the same email It took us about 2 months to start getting the problem, not sure why it varies, just know that turning off the fixup took care of the problem. Our TAM at Cisco never gave us a reason, just said they had heard this could be a problem for some sites and they just suggested turning it off. Nothing like a good solid technical answer for ya... -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hague, Jeff Posted At: Wednesday, February 02, 2005 4:16 PM Posted To: Exchange-List Conversation: Update - multiple copies of the same email Subject: RE: Update - multiple copies of the same email Well, the new firewalls are PIXs - hmmmmmmmmm. Thanks! Ill look into it. The question that comes up then is why did the duplicates start yesterday? The PIXs went in over a week ago. Jeff -----Original Message----- From: Waters, Jeff [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 02, 2005 4:14 PM To: Exchange Discussions Subject: RE: Update - multiple copies of the same email My first question would be are your running a PIX, and then tell your PIX guy to turn OFF SMTP Fixup. That is the only time I have dealt with this type of problem. Happy Hunting -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hague, Jeff Posted At: Wednesday, February 02, 2005 4:01 PM Posted To: Exchange-List Conversation: Update - multiple copies of the same email Subject: RE: Update - multiple copies of the same email I just found that a meeting request sent by one of our inside users has been duplicated to its recipients about 4 times - certainly that cant have anything to do with our external DNS... So I guess it has become more of a specific Exchange 2000 question. Has anyone ever seen an Exchange server send duplicate emails? Thanks again. Jeff -----Original Message----- From: Hague, Jeff Sent: Wednesday, February 02, 2005 3:52 PM To: Exchange Discussions Subject: multiple copies of the same email This is more of a generic email question than an Exchange related one but, for the record: Windows 2000 Advanced Server SP4, Exchange 2K SP3, Windows 2000 AD, all exchange services on 1 box. We host our primary DNS server on site and our ISP hosts 2 secondary servers off site - our records point to those servers. We installed new firewalls on Monday Jan 31 and this past Monday we added a 2nd Internet connection with new routers and we are now using BGP to advertise routes - some through 1 connection, others through the new connection. All of this seems to work as anticipated however we found out yesterday that the rule in the firewall that is supposed to let the secondary DNS servers do zone transfers with the primary didn't work. The secondary servers stopped responding to querries for our domain yesterday afternoon because their records were no longer considered valid. We got that fixed at around 8pm yesterday evening. Now the question... Ever since the DNS servers went on strike, we have been receiving multiple copies of emails - some are just a single second copy but others are many - I have received 1 email at least a dozen times for instance. From the volume of calls we have received, it seems to be happening to the vast majority of our 1500 users but I can't say that it's happening to all of them. Also, emails from List services like this one seem to be more prone to this than emails from individuals but there are some we have seen from individuals. Our incoming SMTP hits a Barracuda spam appliance first and then goes on to our Exchange server. I don't see anything out of the ordinary with those 2 machines. Does anyone have any idea why this might be happening and how long we can expect it to continue now that the DNS issue is resolved? Is there anything we can do to prevent it from happening in the future (in addition to making sure that DNS stays up, of course...)? Thanks! Jeff Hague MCSE Network Manager Randolph-Macon College Ashland, VA _________________________________________________________________ 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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