SquirrelMail

Web · Self-hosted

Freedom report

One barScore 5.1

SquirrelMail is ranked #125 of 143 in email clients on Freedom251, made by SquirrelMail. It runs on Self-hosted, Web. There is a free plan.

SquirrelMail plans and pricing

SquirrelMail Free GPL licensed · self-hosted webmail; requires a web server with PHP and access to an IMAP server squirrelmail.org · 12 Oct 2026

What it does: SquirrelMail is a standards-based webmail package written in PHP.
Mail protocols: It includes built-in PHP support for IMAP and SMTP.
Core features: The project lists MIME support, address books, and folder manipulation among its email-client features.
Browser compatibility: Its pages render in HTML 4.0 without requiring JavaScript.
Installation requirements: The administrator manual lists a web server with PHP and access to an IMAP server that supports IMAP4rev1 as requirements.
Customization: The project lists 231 plugins in 14 categories, which administrators can use to customize installations.
Security: The security page lists a 2025 XSS vulnerability affecting versions through 1.4.23-svn-20250401 and 1.5.2-svn-20250401.
Download versions: The download page lists stable version 1.4.22 and daily stable and development snapshots.
Support: The project directs end users and system administrators to different support resources and also links to commercial support.
Intended users: The project describes use by end users whose employer, school, organization, hosting company, or ISP manages the installation.
License: SquirrelMail is licensed under the GNU General Public License, and the project says there are no license fees.
Founded: 1999
Price from: Free

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