You said your MX records point to "your spam filter", is this another server or an appliance? What does the message header look like once the user receives the message? Is the routing path correct? I would guess that your spam filter is messing up and re-transmitting the messages for some odd reason. From the screenshot below it looks like messages are re-transmitted every ~30 mins. Are all the messages repeated about every 30mins? Any odd event logs? Might want to turn logging to Medium on MSExchangeTransport\SMTP Protocol, Categorizer, Routing Engine/Service, Do you have SMTP protocol logging enabled? If so check to see where the messages are coming from each time. If they are coming from your spam filter check the logs on it to see if it is receiving the message multiple times. If it is receiving the messages multiple times it might be sending a transmit error or some type to the sending server which is in turn causing the sending server to retransmit the message. If it is only receiving it once but then resending the messages multiple times to your Exchange server I would contact the vendor of your spam filter. Check your SMTP protocol log on the Exchange server to see if it is generating any error General SMTP Troubleshooting info: http://technet.microsoft.com/en-us/library/aa996805.aspx MSExchange.org troubleshooting article: http://www.msexchange.org/tutorials/Exchange-Server-2003-Mailflow-Part1. html Jason Sherry Messaging Architect, MCSE: M, Microsoft MVP From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Rich Gallo Sent: Tuesday, February 13, 2007 10:04 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Repeating Emails Some very good thoughts, but nothing I have found seems to point in that direction L Here is an example of what I am dealing with in regards to one of these messages. This is a screen shot from Message Tracking center for ONE of these messages (this isn't even the entire result...it keeps going until I blocked the sender early this morning) See how the same message keeps getting delivered over and over and over again???: ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Taylor, George Sent: Tuesday, February 13, 2007 11:38 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Repeating Emails It kinda sounds like a scripting or group membership issue at the sending side. Could the other end be sending to multiple groups with the user in each one of those groups? Sending directly to the user and then again to a group the user is a member of. Someone fat fingered a script on the sending machine? The sender is Outlook with multiple rules that trigger on the same criteria? Just a few thoughts. George Taylor Systems Programmer Regional Health Inc. ________________________________ From: Rich Gallo [mailto:RGallo@xxxxxxxxxxxxxxxxx] Sent: Tuesday, February 13, 2007 8:31 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Repeating Emails I should have said this in my previous email... The only common thread with these messages are that they are messages that are automatically generated. For example, a hotel reservation, or a confirmation that something has been received, such as a resume submission... Other than that, these messages are fairly innocuous. ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Sarbjit Singh Gill Sent: Tuesday, February 13, 2007 10:10 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Repeating Emails Is there something common in the users who receive multiple copies this emails. For example, they have certain embedded data in the email (like a picture) or maybe they all had a certain kind of attachment of a certain size /Gill From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Rich Gallo Sent: Tuesday, February 13, 2007 10:56 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Repeating Emails Hey All, I wanted to know if anyone has ever come across this problem. Been scouring the net like crazy and not coming up with anything solid. Every now and again, I have users telling me they are receiving MANY copies of the same message form the same sender (known senders in all cases). Looking at things from my end, server side, it's as if Exchange is "rejecting" the email, requesting another copy form the sending server, and still delivering each instance of the copy to the recipient on my end. The cycle doesn't end until I block the sender in he spam filter to stop the message in its tracks before it hits my Exchange server again. I don't know what to do here..pulling my hair out... ANY HELP at all is GREATLY appreciated!! Rich Gallo Network Administrator Lloyd Staffing PS, it's Exchange 2003 SP2 running on Windows Server 2003 Standard, SP1.... -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.17.37/682 - Release Date: 2/12/2007 1:23 PM -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.17.37/682 - Release Date: 2/12/2007 1:23 PM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.17.37/682 - Release Date: 2/12/2007 1:23 PM ***Note: The information contained in this message, including any attachments, may be privileged, confidential, and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the Sender immediately by a "reply to sender only" message and destroy all electronic or paper copies of the communication, including any attachments. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.17.37/682 - Release Date: 2/12/2007 1:23 PM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.17.37/682 - Release Date: 2/12/2007 1:23 PM