SquirrelMail

Place

#127 of 142

Chart

Score

6.1

The facts below are what the maker publishes about SquirrelMail, checked and dated. Our editors have not written about it yet.

Plans and prices

From SquirrelMail's own pricing page, checked 12 Oct 2026.

Plan	Price	What it gives you
SquirrelMail	Free	GPL licensed · self-hosted webmail; requires a web server with PHP and access to an IMAP server

Each one read from SquirrelMail's own pages, with the date it was checked.

App coverage: webchecked 24 Sep 2026
Browser compatibility: Its pages render in HTML 4.0 without requiring JavaScript.checked 12 Oct 2026

Calendar tools: Yeschecked 24 Sep 2026
Core features: The project lists MIME support, address books, and folder manipulation among its email-client features.checked 12 Oct 2026
Customization: The project lists 231 plugins in 14 categories, which administrators can use to customize installations.checked 12 Oct 2026
Download versions: The download page lists stable version 1.4.22 and daily stable and development snapshots.checked 12 Oct 2026
Installation requirements: The administrator manual lists a web server with PHP and access to an IMAP server that supports IMAP4rev1 as requirements.checked 12 Oct 2026
Intended users: The project describes use by end users whose employer, school, organization, hosting company, or ISP manages the installation.checked 12 Oct 2026
License: SquirrelMail is licensed under the GNU General Public License, and the project says there are no license fees.checked 12 Oct 2026
Mail protocols: It includes built-in PHP support for IMAP and SMTP.checked 12 Oct 2026
Security: The security page lists a 2025 XSS vulnerability affecting versions through 1.4.23-svn-20250401 and 1.5.2-svn-20250401.checked 12 Oct 2026
Support: The project directs end users and system administrators to different support resources and also links to commercial support.checked 12 Oct 2026
What it does: SquirrelMail is a standards-based webmail package written in PHP.checked 12 Oct 2026