SquirrelMail is a free, open-source webmail client designed to be lightweight, secure, and easy to use. It allows users to access their email accounts directly through a web browser, without needing to install separate email software like Outlook or Thunderbird. Built primarily with PHP, it works with standard mail servers using protocols such as IMAP and SMTP.

For website hosting customers, SquirrelMail is often available as a pre-installed option in control panels like cPanel. It provides a straightforward, no-frills interface for managing email, making it a reliable choice for basic email needs. Its key features include:

• Composer for writing and sending messages.
• Address Book for storing contacts.
• Folder Management for organizing mail using IMAP.
• Strong focus on security and standards compliance.

While modern webmail services like Gmail or Outlook.com offer more advanced features and sleek designs, SquirrelMail remains valued for its simplicity, low server resource usage, and stability. It is an excellent tool for users who prefer a fast, functional interface without distractions or for businesses that need a dependable, self-hosted email solution integrated with their hosting package.