Exchange 5.5 running on NT 4 has following problem.
All outgoing Email sits in the Outbound Queue. If I open any of the Queued messages [Host Unreachable] is the reason given. I need to get this resolved real fast ;-). The machine has IP Connectivity on the LAN. From the Command Line I can ping and resolve Apple.com I am however unable to telnet on port 25 to the Exchange machines IP address from a LAN PC or even when tried on the Exchange Server.
Port 25 is open on the firewall. Please help :-(