ANT 4 MailChecking is a system-tray utility that lets you know when you have new email messages.

It''s very easy to set up and use and even includes support for spam filtering. It allows you to set up as many separate accounts as you like and checks for new messages at a regular interval of your choosing. ANT 4 MailChecking also allows you to set up a variety of spam filtering rules, based on sender, subject, and message size.