Hello.. I have a computer with exchange server 2000 and it's also a domain controller and DNS server. besides i have a computer that have two NIC, one has the external Ip and the other one has the internal IP. I have a external DNS with a MX that point to my external IP. All my emails go out to internet, but nobady enter to the internal net. How can I configure my exchage to allow enter the external mail? I don't speak much english, please excuse my english. Thanks.