Ok there is another problem...
-------------------
Example so you understand what I am looking for:
Lets say that I purchased the rights to use www.myownlinuxdomain.com
I have this domain name hosted by a third party web host. But I want to get a dynamic DNS sevice and host that URL on my own box with my current ISP connection.

Part One

First question:
What does "parked" mean and how do I change it or get them to "Unpark" it?

Second question:
What stops people from "parking" a URL of someone elses and one that I have not paid for?

-------------------
Part Two

Third question:
Now that I have a Dynamic DNS set up with www.myownlinuxdomain.com and an e-mail server, will any *@myownlinuxdomain.com be routed to my email server (according to my email settings of course) or will it go looking elsewhere?

Fourth question:
How do emails get routed, by ISP or by domain name?

-------------------
Part Three

Fifth question:
Is there an easy website that I can go to so that I can learn more about this? ...or should I just buy a gun?