MAILUTILS

Mailutils is a swiss army knife of electronic mail handling. It offers a rich set of utilities and daemons for processing e-mail... For system administrators, Mailutils provides a set of daemons for delivering and reading electronic mail, including pop3d, imap4d, local mail transport daemon lmtpd, and a universal mail delivery agent, mda, and LMTP daemon... Finally for software developers Mailutils offers a set of libraries for doing almost any mail-related task on any existing mailbox format, and all that using a consistent, format-independent, interface.