If you have multiple e-mail accounts set up on your iPad (iPhone or iPod touch), you can set a “Default” account. This means that when you create a new message, it will send from the default account. When you Reply to or Forward a message, it will come from the account that the original message was sent to. This video is shown using iOS 6, but it works the same in iOS 7. New video for iOS 7 coming soon!