Exchange 2003 email reciving issues after IP change
Posted on 2013-11-29
We are merging with another firm who already uses 192.168.1.x network internally so they requested that we change ours to something else so that we can setup a VPN between offices.
We changed the IP's on all of our server, changed all settings in the firewall for port forwarding to the new IP of the Exchange 2003 server, and now we're able to send to external accounts, Send and receive internal emails, but not able to receive external emails.
I've worked a couple hours with a Sonicwall support and they tell me everything looks good on the firewall side, they're able to telnet into port 25 but see no banner (not sure if they have to), but he says everything is working correctly.