Due to last weeks earthquake in Japan our IPL's are down. We are trying to establish alternate connections using P2P vpn tunnels through the internet. We have the tunnel up and everything is working except email. Both sites are part of the same AD. The server on that side is now passing email to teh server on this side. However our server can not connect to thier server. We checked and Port 25 is being blocked some where in the Tunnel. But we can not find it. We have examined every device that we are aware of and can not find the port blocking.
Is there a tool that we can use that would help us identify where the port is blocked?
Is there a way to make Exchange 2007 use another port for Server to Server Communication?