The continuation of the Alpine email client from University of Washington.
RFC 2425 defines a MIME Content-Type for Directory Information. This library contains necessary methods to parse information blocks arranged in such a manner.
The venerable MH message handling system: a command-line based mail user agent for UNIX/Linux developed at the RAND Corporation and the University of California, Irvine.
OpenZMail, an Open Source version of the Unix Z-Mail client.
XCmail is a MIME and multi POP3 server capable mailtool for X11 using the Xclasses layout library. XCmail was designed completely object orientated and by this may be improved easily. <p> XCmail has its own server in the internet. Take a look on it.
YAM - The E-mail client for Amiga computers
YAM (short for Yet Another Mailer) is a commonly used MIME-compliant Internet mailer written for AmigaOS computers. It supports POP3, SMTP, TLSv1/SSLv3, multiple users, PGP, hierarchical folders, filters, a configurable GUI, an ARexx interface and more...
Bot that following the connections interwikis of El Salvador, to add to the original page (that is El Salvador) the present connections in a connected page (that treats about El Salvador) that lacks in the version in Spanish of wikipedia.
nPOPuk is an ultra-small, but comprehensive, e-mail client that runs on a wide range of Windows-based operating systems. See http://npopsupport.org.uk/ for more details.