DCS MailWatcher - Version 4.1 Sits in your system tray and waits for you to receive messages from Exchange Sever. Since MailWatcher uses the same transports as Outlook and Exchange, no polling is necessary for you to be notified, no additional network traffic is generated and no wasted CPU time for your inbox to be checked. You get the notification as soon as your mail arrives in your inbox. MailWatcher can also be used as a lite E-Mail client in place of Outlook.