PinoyPHP Mail is a PHP Webmail E-mail Client which create virtual accounts usable by many users. Requires MySQL, and ONE POP3 account. Added: New Registration, Sent Items, Improved Mail Client. See demo at: http://mail.pinoyphp.info (you may register)
Very simple to use,but needs upgradeing. This project hasnt been updated sence 2007. Any coders out there willing to upgrade this? Being that it is old You may need to set your severs PHP settings to an older version.