Add notifications for mail

At the moment I have some apps that redirect users towards mobile webmail sites using a webview. Basically, this type of app is an elegant hyperlink but nothing special. What I would like you guys to do: to add the functionality of notifications for new emails to the user. When the user clicks the notification, the 'normal' web-based app should be opened. The notifications should always be active (program running in the background all the time). More details to be followed.