SquirrelMail is a webmail application written in PHP. It provides a straightforward interface for reading, composing and organising messages held on an existing IMAP mail server.
The software was designed around widely supported web standards and modest server requirements. Its traditional interface avoids dependence on JavaScript for essential functions, making it suitable for users who prefer a simple approach to email management.
SquirrelMail has a long history and an extensive collection of plugins. Although its official stable release is old, the project continues to publish source snapshots containing compatibility changes, including work for newer PHP environments. Administrators should carefully verify compatibility and security before deploying it on an Internet-facing server.
This is free and open source software.
Key Features
- Read, compose, reply to and forward email messages.
- IMAP support for accessing existing mailboxes.
- Send outgoing correspondence using SMTP.
- Handle MIME messages and file attachments.
- Display plain-text and HTML email content.
- Create, rename, organise and delete mail folders.
- Search messages within supported IMAP mailboxes.
- Threaded message listing for following related correspondence.
- Personal address book for storing frequently used contacts.
- LDAP address book integration for shared contact information.
- Support for secure connections to IMAP and SMTP servers.
- Configurable mailbox sorting and message display preferences.
- Internationalisation and translations for numerous languages.
- Customisable colours, themes and interface preferences.
- Plugin architecture for extending the core application.
- Optional plugins for message filtering, calendars and additional email functions.
- Traditional HTML interface with minimal reliance on client-side scripting.
Website: squirrelmail.org
Support:
Developer: SquirrelMail development team and contributors
License: GNU General Public License v2.0
SquirrelMail is written in PHP. Learn PHP with our recommended free books and free tutorials.
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| Afterlogic WebMail Lite | Modular IMAP client with contacts, encryption and admin tools |
| JMAP Webmail | JMAP client with shared inboxes, contacts and calendars |
| Tachyon | Lightweight, privacy-focused client with Sieve and DAV support |
| SquirrelMail | Webmail package written in PHP |
Read our verdict in the software roundup.
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