This script is a web-based POP mail client and is very simple to install but nevertheless a quite advanced program.

Some of its features include easy to install (does not require PHP to be compiled with IMAP support), reads and sends attachments, displays text/HTML attachments in-line (while still giving you the option of saving them to your hard drive), all the basic functions (send, receive, reply, reply to all, forward, delete), view all headers or the full source of the email, works even if the user has disabled cookies, localized date field, translated into several languages, can be set up to check for new messages automatically, customizable page layout, and more. Awesome Script!