Thanks Darren, we had our ISP enter a reverse DNS entry pointed back to our exchange servers WAN IP address and though it took a little while, it seems that we are now able to send e-mail to hotmail again.
Thanks Darren, most of what I have been able to find points to reverse dns lookup, that is a likely cause. I will look into this and see what I come up with, thanks,
Bob
Thanks DG, wouldn't this also block a message that is in reply to a message sent from hotmail as well? When someone recieves a message from a hotmail account and replies, the message goes through. But if they create a new message and put a hotmail acount in to address, it dissapears, no error...
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