Squirrelmail is an open-source web-based email client written in PHP. It is designed to provide users with a simple and intuitive interface to access their email accounts from a web browser. Squirrelmail is a popular choice among webmasters looking to provide their users with the ability to access their email accounts remotely, as it is free and easy to use. It supports IMAP, POP3 and SMTP protocols, and works with most email servers. Squirrelmail offers a range of features, including address book, calendar, task manager, custom themes and plugins. It also provides users with secure login, with support for SSL and TLS encryption protocols. Squirrelmail is available as a standalone application, or as an integrated part of a web hosting control panel.
Discontinued No longer supported
Discontinued The project is no longer being developed. The latest version, 0.1.1, released in February 2015, can still be downloaded from the official website.
This is a service, not a self-hosted application.