OpenXP 5 - a multi-protocol offline mail and news reader
...It is based on OpenXP (https://sourceforge.net/p/openxp, currently inactive) which is based on CrossPoint (XP) by Peter Mandrella.
OpenXP 5 is capable of establishing TLS encrypted connections to POP3, IMAP, SMTP and NNTP based servers and supports the new IPv6 protocol.
see:
http://de.wikipedia.org/wiki/CrossPoint
http://svn.code.sf.net/p/openxp5/code/doc/Crosspoint_Versions.pdf
http://groups.google.com/forum/#!forum/de.comm.software.crosspoint
MBSE BBS is a full FTN-capable ANSI BBS and mailer package.
MBSE BBS is a fully FTN-capable ANSI BBS package including a mailer (ifcico clone), BinkP daemon, mail tosser, TIC processor, filefind, and other utilities allowing access via modem and the Internet using telnet, ssh, http and ftp.
Support is offered through the Fidonet MBSE echo and the Micronet MIN_BBS echo.