I can't send IIS mail server.

                  Netizen: I am using 2003, my own IIS mail server, but I can not send mail to users such as 163 on this machine, but can send it to other users in the domain. Do not understand? Tang Tao: First of all, we must make clear two points. To achieve the external network to send and receive mail, you need to meet two conditions. The first condition is that the computer is connected to the external network and has a public IP address. Second, there are domain names registered in the public network. It is no problem to meet these two conditions to send and receive mail to the external network. If it is not possible to send, most of the DS records are not set in the DS.