SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure HTML 4.0 (with no JavaScript required) for maximum compatibility across browsers. It has very few requirements and is very easy to configure and install. SquirrelMail has all the functionality you would want from an email client, including strong MIME support, address books, and folder manipulation.
Webmail 是一种让你通过web浏览器查看邮件的软件，无论你身处何方使用什么样的计算机。Squirrelmail是一个简单，快速而且非常流行的webmail软件包。这里是网址链接。这个指导可以让你在自己的服务器上建立起一个即可以在家庭网络也可以在外面使用的webmail。