Unfortunately I can't post the URL, but if you run a Google search for "MX record", you will probably get a list that includes a site tilted "Oversimplified DNS - MX (E-mail SMTP server) record". This person seems to have a grip on how to write in English. Even I could understand it. It's a good start anyway. Good luck boss.
I was just getting bogged down in too much heavy detail with practically all the resources I investigated on MX records. I was needing some simpler, more elementary info on this. Like I said "practical examples."
Thanks guys, good stuff . I have saved the links and will attempt to sharpen my mind and bend the old learning curve.