Quoting Rohan McLeod (rhn@jeack.com.au):
Rick I am sure for you this seems a small thing; but for me it would be a fairly steep learning curve;
At the time I figured out how to run my own Linux server, I was a tax preparer and staff accountant, with zero IT experience. It took a couple of days to get it right (and, of course, use of a static IP address). The first machine was still my old 486, if memory serves. I actually deferred the problem of domains and DNS until long after setting up my Linux server with SMTP Mail: Fortunately, a friend of mine owned domain 'imat.com', and was glad to make an entry in his DNS for 'hugin.imat.com' pointing to my new Linux server. He kindly keeps that entry valid, which is why I continue to be reachable on my Linux server as 'rick@hugin.imat.com', as I have been since around 1994. ISTR a friend bought for me the 'linuxmafia.com' domain around 1998, which is perforce when I learned domain administration and authoritative DNS.