You can set up different sounds for your general notifications or customize sounds for each email account.

1. Open the app settings (View) - 'Email Management' section and then tap on 'Email Notification Settings'
2. Tap on 'Email Sounds' in the top of the edit notification screen to set the default email notification sound using the 'New Email' sound selection.
3. Otherwise you can open an email account by tapping on it, and then tap on "Sound" under the account to choose a sound.
4. Tap on the sounds to hear a sample and also to select the sound
5. You can also choose the 'Vibrate' option in the top of the sound list to use a silent phone vibrate notification