The Bat! is a powerful email client software that provides advanced security, highly configurable, customizable interface and best mail filtering system. It allows you to manage your mail quickly and efficiently, encrypt messages and sign them with digital signatures, efficient processing for large numbers of messages, and processes an unlimited number of email accounts and messages at once. The Bat! comes with an intuitive and user friendly interface, there is nothing special about its interface, something special and extraordinary is its ability.