Hastymail for Linux is a full featured IMAP or SMTP client written in PHP. Hastymail for Linux is compatible with PDAs, phones, text browsers, and all mainstream browsers, W3C valid UTF-8 XHTML pages that can be configured to be delivered as type application or xhtml-xml for supported browsers, multilevel theme system using CSS, PHP templates, and icon sets, the ability to use a database for storing user settings, contacts, and plugin data, with support for both Postgresql and Mysql, flexible plugin system with documentation, examples, and many plugins like a calendar, auto complete, sound notifications, and HTML mail composition.