PoCoMy: Postfix + Courier + Mysql :: Webfrontend for administration. Features: Virtual domains, forwarding, aliases, sender aliases, multi user, multi language, privileges system, delegation of rights per domain, ...
Tortoise Mail is a POP3 and SMTP E-Mail Client written in PHP. By using PEAR Package DB, it supports many SQL-Based Databases (dbase, fbsql, ibase, ifx, msql, mssql, mysql, oci8, odbc, pgsql, sqlite, sybase). It is also PHP 5.x compatible.
SmartPost software provides the total electronic mail solution using UNIX/Linux,with IMAP,POP,webmail access as well as web-based administration and web-based control over the mail server.Project is closed.There are some better solutions on marketnow