Same email being delivered to a recipient every 20 minutes

[JohnTVL]

Hi,

We have Exchange 2003 SP1 on Windows 2003 and every now and then a message will be sent from an external party to one of our users and it will get delivered many times. The message gets to out SMTP gateway which filters the messages then relays them on to the Exchange server. The SMTP relay only acknowledges the reciept of 1 message. If i use the "Message Tracking Centre" in Exchange System Manager, when i locate the particular message I open it up and see what is happening.

Normally if there is one recipient there are 7 lines for the message with the final one saying that it was deliverd to the local store. But in this case it gets to there, then 20 minutes later (as shown in the tracking log) it does the process again like its stuck in some sort of loop. for some messages this can happen for 50 or so iterations, each 20 minutes apart.

If I look at the original message there is a message ID attached to it but all subsequent messages dont appear to have a message ID?

Has anyone got any suggestions?

Cheers,

John

 

[ShackDaddy]

Does your mail come through a Cisco PIX on the way in?