Multiple IMAP/POP mailboxes plus multi-user support, easy-to-navigate interface, floating/dockable toolbars, PGP support, one of the most comprehensive mail filtering systems, advanced mail notification (Mail Ticker), while-you-type spell checking, message templates everywhere allows to save hours of typing, network collaboration gives a possibility to change mail on LAN without a mail server, mail dispatcher allows to manage messages without the actual download directly on the server, easy migration from other e-mail clients and many many more!