The Bat! is a powerful email client that is very easy to use and has quite high configuration skills.
Supports multiple users and accounts at the same time and IMAP / POP mailboxes. In addition, the interface is very simple and includes floating toolbars that you can freely modify.
The Bat! It is specially designed for accounts with a large volume of messages thanks to its powerful engine that provides very fast results. It incorporates a powerful message filtering and advanced notification system to know at all times if an e-mail is reaching us.
The program includes an automatic spell checking tool, supports all versions of PGP and organizes all messages in folders similar to Explorer.