Virtual Exim is a PHP-enabled Web interface for managing multiple virtual mail domains with Exim and MySQL/PostgreSQL. POP/IMAP accounts, aliases, forwards, and permanent fail accounts can all be created and managed easily without the need for corresponding shell accounts. Virtual Exim also allows the server administrator to designate a SiteAdmin who can create and delete domains on the fly through the interface, so no editing of the Exim configuration file is required. Individual users can also log in to change their "Real Name", passwords, and mail filtering options with ease.
fdm (fetch and deliver mail) is a simple, lightweight replacement for mail fetching, filtering, and delivery programs such as fetchmail and procmail. It can fetch using POP3, POP3S, IMAP, IMAPS, or stdin, and deliver to a pipe, file, maildir, mbox, or SMTP server, based on a set of regexps. It can be used for both single user and multiuser setups, and is designed with privilege separation when running as root.