Choose one tone for received mail, then another for sent mail. You decide which sounds to use for all of your accounts.
1. Tap the Nav Icon at the top left corner of the Nav Bar to display the Navigation Drawer.
2. Tap the Gear icon at the bottom of the Navigation Drawer to bring up Settings.
3. Tap Mail.
4. Tap Notifications at the top of the screen.
5. With the Allow Notification slider enabled, tap Sound to open a list of sounds on the phone.
6. Confirm that the Sound slider is on. If not, tap slider to enable.
7. Tap Received emails and choose your sound selection. Tap OK.
8. Tap Sent email and choose your sound selection. Tap OK.