GNU Mailman is a computer software application from the GNU Project for managing electronic mailing lists. Mailman is coded primarily in Python. Mailman is free software, licensed under the GNU General Public License. 

http://ml.ci.uc.pt/mailman/
http://flybynews.com/mailman/
http://www.winehq.org/mailman/
http://lists.gnupg.org/mailman/
http://mailman.acomp.usf.edu/mailman/
http://lists.drupal.org/mailman/
http://webmail.mnet.state.mn.us/mailman/
http://www.ogf.org/mailman/
http://theory.sinp.msu.ru/mailman/
http://lists.cluenet.de/mailman/
http://list.blackcats.org.uk/mailman/
https://lists.secondlife.com/cgi-bin/mailman/
http://lists.xen.org/cgi-bin/mailman/
http://miniaturelists.com/mailman/
http://lists.fossil-scm.org:8080/cgi-bin/mailman/
http://sqlite.org:8080/cgi-bin/mailman/
http://starj.com/mailman/
http://listas.softwarelivre.org/cgi-bin/mailman/
http://lists.arin.net/mailman/
http://www.wplug.org/mailman/
http://www.open-std.org/mailman/
http://mail.etree.org/mailman/
https://listen.jpberlin.de/mailman/
http://gator2004.hostgator.com/mailman/
http://noticias.livio.com/mailman/
http://developer.marklogic.com/mailman/
http://list.webaim.org/mailman/
http://lists.copyleft.no/mailman/
http://www.orcas.net/mailman/
http://lists.randombit.net/mailman/
http://mail.scipy.org/mailman/
http://mail.kein.org/mailman/
http://mailman.nginx.org/mailman/
http://www.audifans.com/mailman/
http://list.healthnet.org/mailman/
http://peter.petra.ac.id/cgi-bin/mailman/
http://optimizationweek.com/mailman/
http://lists.icpsr.umich.edu/mailman/
http://roadtonet.com/mailman/
http://list.xvid.org/mailman/
http://lists.lugod.org/mailman/
http://www.skiifwrald.com/mailman/
http://lists.umanitoba.ca/mailman/