Spmail
Spmail is a free web-based email client that allows users to send, receive and filter email from the POP3 mail server while they read and compose messages. It features: Message filtering, Multiple e-mail accounts, Address Book support, MIME encoding/decoding, Signature, and Show all headers - allows users to view all headers of incoming messages. Spmail requires a MySQL database, and DBI, Msql-Mysql, MD5 Perl modules.