My mail server: Exchange 2003 (6.5 SP2) running on Server 2003 R2 Std SP2.
Network background: my LAN is part of a larger county-wide LAN. The county admin gives me public IPs to be able to manage my own mail/web server/etc. I have my own NAT router at the gateway of my LAN. I recently switched over to a new faster internet connection (same ISP), which required the county IT admin (so he says...) to change routing so that I don't actually have a public IP on my private router, but the WAN port on my router now has a private IP. Things are working now, except...
Users in my LAN cannot send email to the county's mail server. I had to add custom DNS entries in my DNS server to point to the (private IP of the) county's mail server, and now I can perform a successful manual telnet 25 session from my mail server (rebooted it too), but I see the outgoing SMTP queue in Exchange still waiting to send.
Any ideas here? How can I get this fixed? Thanks for any assistance.
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