Endymion MailMan

Endymion MailMan is a web-based application that allows users to send and receive Internet email from any Internet-connected web browser. Endymion MailMan uses any existing POP3 mailbox and SMTP server, so it integrates with your existing infrastructure effortlessly. It supports a frames-based interface, message attachments, HTML formatted email (when properly MIME encoded), and is completely customizable by modification of simple HTML templates.