Check for new messages multiple mail accounts and receive notifications, with Magic Mail Monitor
Magic Mail Monitor is a free, light and convenient program that can prove very useful if you want to monitor one or more accounts for new mail.
A nice feature of Magic Mail Monitor is the ability to preview messages before you download them with your main email program, even delete them on the server immediately. The program can connect to as many POP3 email accounts as you want, including on line mail services such as Gmail.
When new messages arrive the program notifies you even using custom modes (different sounds, etc.) depending on particular accounts. Known and trusted senders can be marked with a different color.
Besides preview and deletion Magic Mail Monitor lets you even reply immediately to the sender without getting the message with your main email program, or save messages as text files.