Ability Mail Server has been designed to be small, fast, reliable, advanced, easy-to-use, and very feature rich. It is capable of running on both the Internet and a LAN (i.e. for external and/or internal mail systems). Features include incoming/outgoing SMTP, POP3, IMAP4, Web mail, Remote Admin, Virus Protection, mailing lists, static routing, automatic sign-ups, aliases, redirection, auto-responses, multiple folders and address books.

Version 1.19 features enhanced mailing lists and improved Web mail.