I know there is a simple solution but having trouble finding it - mainly because I probably don't know terminology. Here is the simple issue.
We have Exchange server that works fine with MANY email domains running on it. We setup all the MX records to be mail.domain.com and their POP server works via Internet outside our network. However if we connect to our internal network with same laptop - the mail.domain.com will not work, but the private IP of the email server will. So we are having a DNS issue somewhere. Editing the HOST file on the PC works for PCs that stay inside office but it is a pain for laptops having to change incoming server from mail to ip and vice versa.
So I guess I need step by step for an Exchange 2003 for "shadow" DNS entry at the server layer?