I have discovered the best sound to use for a new mail notification in your e-mail client. It's the object pick-up noise form Atari's Adventure for the 2600. I've attached the WAV file to this post so that you to can feel like you are grabbing the goblet next time you get a v!@gr@ ©ialis spam in your in-box!
Makers of the the first video game system I ever owned, the Atari 2600 VCS.