SquirrelMail 是一个用PHP开发的Web邮件系统。它内置纯PHP支持的IMAP和SMTP协议，所有页面都遵循 HTML 4.0标准(没有使用任何 Javascr ipt 代码)，以便最大限度兼容各种多浏览器。SquirrelMail对系统要求非常低，安装和配置都非常容易。 SquirrelMail 具备一个客户端邮件程序所应拥有的一切功能，包括支持增强型的MIME、地址薄、文件夹操作等等功能。-SquirrelMail is a PHP development with the Web mail system. It contains pure PHP support IMAP and SMTP protocol, all pages are followed by HTML 4 standard (without using any Javascr ipt code), in order to maximize compatibility with a variety of multi browser. SquirrelMail on the system requirements are very low, installation and configuration are very easy. SquirrelMail has a client mail program should have all the features, including support for enhanced MIME, address book, folder operations, and so on.