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Exchange 2003 connection going silent after large DATA packet

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Exchange 2003 connection going silent after large DATA ... - 17.Nov.2010 1:23:34 PM

emailman

Posts: 23
Joined: 5.Feb.2007
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I have an Exchange 2003 server that is not delivering some messages to Hotmail and a couple other popular domains. I did a packet capture to see what was wrong with the problem messages. It seems our Exchange server is sending a large packet of the first DATA fragment (8280 bytes in my case) and Hotmail is sending back 4 RST+ACK packets in response. Then our Exchange server does nothing (no more packets). This transaction repeats many times and the sender gets a delivery delayed message and finally a delivery failure message. I can't figure out what the problem is. I don't see any problems reported in the Event Viewer. It seems in times past that a reboot would fix it, but it hasn't for this one. If anyone has any clues or any pointers on how I can better troubleshoot, let me know. Thanks!

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RE: Exchange 2003 connection going silent after large D... - 17.Nov.2010 8:35:46 PM

uemurad

Posts: 8232
Joined: 7.Jan.2004
From: California, USA
Status: offline

Check your SMTP log (activate it first if needed). That will tell you at a higher level what Exchange thinks is happening with the communication stream.

_____________________________

Regards,

Dean T. Uemura
Microsoft MVP - Exchange (2007-2011)
exchangeguy.blogspot.com
uemurad@yahoo.com

(in reply to emailman)

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