Gmail has the ability to receive, and SEND, email from a 3rd part POP server.
So basically I send and receive email as "DON@fooooo.com" through GMail.
The second diagram sums it up nicely:
Send mail from another address without "on behalf of" - Official Gmail Blog
It all defaults beautifully. Emails sent to my gmail, I hit reply and it's from my Gmail. Mail to fooooo.com, hit reply and it's from and through my foooo.com server.
Problem is, that when I hook my blackberry up to this gmail, that knowledge seems to get lost -- and no matter what I do, if I reply on my blackberry, it's always from my gmail account. VERY annoying.
Does anyone have suggestions or ideas on what I'm missing?