I recently tried to upgrade our router to avail of extra download capacity. The older model limited us to 6mb whereas the new will give us up tp 24mb. I configured the new router exactly as the old was, i.e. port 25 open through the firewall. I can telnet port 25 with the new router in place. Everything appeared to be fine, except i then noticed that outbound messages began to queue and never stopped queuing. The message detail in the exchange queue gave me nothing. All inbound delivered fine. I left it a while but after 24 hrs NDR's arrived. I put back in the old router and the queue clears almost immediately. Any sugesstions would be greatly appreciated.
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