Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Cone is a text-based e-mail client and news client for Unix-like operating systems. It is developed by the Courier Mail Server developers. Its name stands for "console newsreader and emailer". Notable features include support for Unicode and support for SMAP. An email client, email reader, or more formally mail user agent (MUA), is a computer program used to manage a user's email. The term can refer to any system capable of accessing the user's email mailbox, regardless of it being a mail user agent, a relaying server, or a human typing on a terminal. In addition, a web application that provides message management, composition, and reception functions is sometimes also considered an email client, but more commonly referred to as webmail.

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