Just to close this down, I was never able to find a solution to my problem. I could never find a way to get the built-in QB email service to reflect my business. It's a nice service, in theory, to have a built-in function to QB that allows you to email invoices and such directly to your customers. But, if the emails all come from Intuit instead of your business, your customers will always be confused. So, it's a good idea with miserable execution.
If anyone ever figures this out, please post a solution.
I eventually just pointed my email to run through my MS Exchange server. That does what I want and it wasn't too difficult.
