An addon domain is a fully functional domain that can be created from within your control panel. Think of it as having multiple hosting packages all sharing the same control panel. You can give them email addresses, forwarders, and more the same way you do for your main domain on the account.
The addon domain will appear as a totally separate domain from your primary domain. There should be no evidence that your domain is an addon domain to incoming traffic when they visit your addon domain.
The username you chose when you created your addon domain will be the name of the folder within your public_html that the addon domain will be loading it's files and content from. That folder is called the "Document Root" of your addon domain and this folder is always a sub domain.
You may actually load your addon domain in one of three ways:
- http://addondomain.com/ ( As an addon domain )
- http://addondomain.com.primarydomain.com/ ( As a sub domain )
- http://primarydomain.com/addondomain.com/ ( As a sub folder )
Unless otherwise specified by a script you have installed on this addon domain, all three examples should load the very same content.