I've configured our internal Exchange servers to relay outbound mail through a proxy/firewall. <BR><BR>I've noticed that the headers on external emails contain the private IPof the internal mailserver ...

I know that you can not use internal IP addresses over the internet. Yet, all the router books and security books say that I should block any internal IP addresses from the internet at my border ...

Over the timeline of local area networking, every single device has been included with the internal based IP address, which is known as private address. As you will be configuring upon with your ...