SquirrelMail - Free Webmail

SquirrelMail is an open-source webmail application written in PHP, offering a simple and efficient interface for accessing email via web browsers.

Features

• Standards-Based: Supports IMAP and SMTP protocols, ensuring compatibility with various email servers.
• Pure HTML Interface: Renders pages in HTML 4.0 without relying on JavaScript, enhancing browser compatibility.
• MIME Support: Handles multimedia emails effectively.
• Address Book: Includes a built-in address book for managing contacts.
• Folder Management: Allows users to organize emails into folders.
• Plugin Architecture: Over 200 plugins available to extend functionality.

Pros

• Lightweight: Minimal resource requirements make it suitable for various server environments.
• Customizable: Extensive plugin support enables tailored features.
• Broad Compatibility: Pure HTML design ensures it works across numerous browsers.

Cons

• Outdated Interface: The user interface appears dated compared to modern webmail clients.
• Limited Updates: The last official release was in 2011, with minimal updates since.
• Security Concerns: Lack of recent updates may pose security risks.

Free Plan Details

SquirrelMail is entirely free to use under the GNU General Public License (GPL). Users can download, install, and modify it without any licensing fees.