We have a system (WhatsUp for those who are familiar with it) that monitors our network and send us e-mail notifications when a network device goes down. I can customize my blackberry to only sound when receiving WhatsUp or any other messages especially at night time. Now, I was threatening to take my blackberry away because I was giving an iPhone 4 instead. I have not been able to figure it out how to customize the iPhone 4 to only beep when receiving e-mail notifications from our WhatsUp system. Has anybody run into a similar problem and been able to customize the sounds in the iPhone to only beep with certain in-coming e-mails?

Thank you.