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emailman -> Exchange 2003 connection going silent after large DATA packet (17.Nov.2010 1:23:34 PM)
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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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