I plan to change from the red service to Start in the next month.
I have already purchased my own domain in order to switch over all my email before I cancel my existing service.
I am using Windows Live Mail 2012 on Windows 7 to access and store all my emails. I don't use web mail or store email online. (That's just me, I understand and appreciate that many users don't do it this way.)
With red it is necessary to add my domain's email address settings in an additional "account" in order to retrieve messages from my domain's email accounts.
I'm not 100% sure what you're asking as that link is about how to pull mail from other mailboxes into Yahoo's web mail. If you have your own domain and mail services somewhere then you should be able to do what you're currently doing now no problem with our service.
If I've misunderstood or you have any other questions just let me know.