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SquirrelMail

A standards-based webmail application written in PHP for IMAP servers.

About SquirrelMail

SquirrelMail is a traditional webmail client that renders email through a standard web browser. It is built around the IMAP and SMTP protocols, so it works with any email server that supports them. The interface is simple and functional, focusing on reading, composing, and managing messages without heavy JavaScript.

The software supports MIME attachments, address books, folder manipulation, and multiple language translations. It runs on any PHP-capable web server and connects to existing IMAP accounts. Plugins are available to add features like vacation messages, spell checking, and calendar integration. Configuration is done through PHP files and a web-based setup tool.

SquirrelMail is suited for organizations that want a lightweight, no-fuss email interface without database requirements. It is released under the GNU General Public License and has been a stable choice since the early 2000s. While development has slowed, it remains deployed on many shared hosting platforms.
Email Servers

Quick Facts

Pricing
Free
License
Open Source
Platform
Any Platform
Version
1.4.22
Developer
The SquirrelMail Project