Open source monitor email from multiple accounts : Magic Mail Monitor

Magic Mail Monitor (MMM) is a free POP3 mail monitor with multiple accounts support. It sits silently in your system tray, and notifies you about new messages in your mailboxes. Then you can preview messages and delete unwanted mail in order to avoid spam and viruses.

To help you fight spam, save time and traffic, MMM offers configurable filters, friends list, partial loading and other easy to use tools.

 

 Magic Mail Monitor is completely free. Sources code is also available. 

Learn more about Magic Mail Monitor.