Thank you all in advance for your assistance.
I have a domain controller setup that handles my entire internal network's DNS, WINS and internal HTTP processing. For clarity's sake we'll say the domain controller is DC-1.net. The DC is set up with DNS forwarders to my ISP's DNS servers so that any address outside my network is properly resolved. However, I do not have a dedicated connection to the internet (well, I do but it's a dynamic IP and I don't really want the hassle of setting up and maintaining exchange and external web servers) so my external website and e-mail are hosted by a third party through a domain registration also called DC-1.net.
Everything is working fine; i.e., my internal stuff is working and my external stuff is working when accessed from an external web location but when I try to get to my webmail application or to the external domain from inside my network, I encounter an HTTP 404 error message. I understand that this is because addresses try to resolve inside my domain because the DNS system does not see a need to forward those for external resolution.
So my question, is there a way for me to forward http://webmail.dc-1.net
for external DNS resolution? Or have I shot myself in the foot by trying to use the same internal name as an externally hosted site?
Many, many thanks for your assistance.