Okay I think this could be the problem though I will not, and do not use
exchange.
But without the Exchange logs, this is hard to understand,
1) As I have noticed recently their is some fubar with some DNS servers.
2) Some misconfiguration with your DNS Server.
3) You are trying to send from an IP Address not allowing to send from, such
as an interlog IP Address.
The best thing is to provide all information that you can.
Especially with Exchange as it is so royally f-ed up..
Jason
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Jason Robertson
Network Analyst
[EMAIL PROTECTED]
http://www.astroadvice.com
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