iPhone Email Client
We've created iPhone application which allows users to read messages from their webmail account. This application remembers users' login and password for faster access and provides Apple Push Notification to notify about new mail.
Application required integrating with existing webmail system and mail server. This allows us to send notifications as soon as mail is received instead of polling for new messages.
If app user is currently viewing messages list application refreshes it only when it receives notification about new message. This way we don't use too much of users' bandwidth.
Users can also send new messages from their phone or register new account if they didn't yet.