it works when I use the ip address you gave me. What is this IP address? I assume I now have to put in the IP address of the name server for my ISP. I can see it in the status area of my router.
Again thank you.
With your help and a few others, I have been able to build and get working, my own mail server, in a week, without ever having touched linux before. I can see that I have embarked on a journey that I am going to enjoy.