I would like to see a setting that enables you to turn off the outgoing mail server for Yahoo Mail (currently not possible) so that mail can be sent from an inactive Gmail SMTP outgoing mail server. That way you can use the Yahoo Push Mail for all incoming mail, and all outgoing mail would be sent through your gmail account. Complicated, because Gmail doesn't have push, but it does have forwarding, whereas Yahoo Mail does have push, but it doesn't have forwarding. This way, I would only have to manage one account on my iPhone (Yahoo), not two. If you try and turn it OFF, it still says ON, so long as Yahoo mail is active.