SBPop

SBPop automatically polls your internet mailbox for incoming mail. If new mail is detected, it can sound an audio alert and/or flash it's icon to let you know that mail is available.

SBPop sits in your windows system tray (the little bar that runs across the bottom of your windows desktop). It constantly monitors your email server and when a new email arrives on the server, it will display a flashing indicator and optionally play an email notification sound.