The Courier mail server is a mail transfer agent (MTA) that provides ESMTP, IMAP, POP3, SMAP, web mail, and mailing list services with individual components. It can arrange mail services for regular operating system accounts. The courier mail server configuration can also offer mail services for virtual mail accounts, managed by any of LADP directory service, Berkeley DB, MySQL or PostgreSQL authentication database. It is compact, easy to configure, use and contains Web and SOCKS servers. It will help you to quickly arrange e-mail exchange in local network and Internet.