Sympa is an extensible and advanced 17813.html "> customizable mailing list software." It can handle large mailing lists above 780,000 users and provides a complete Web interface for users and administrators.
In the case of authorization, Sympa can customize web and mail templates, have dynamic mailing list capabilities, and support the use of multiple mailing list backend (including ldap,sql files, lists, or other). Sympa is the only mailing list software currently available to support S/MIME and Dkim, and provides authentication and encryption capabilities.
Sympa 6.1.10 This version fixes several errors, including errors that cause Sympa Perl5.14.2 to crash. Updated features include: Sympa performance improvement move the list of parts to the database, allowing you to generate new files, message footer instantiation, new configuration options, translation improvements, riseup patches and many other improvements.
Software Information: http://www.sympa.org/
Download Address: http://www.sympa.org/distribution/sympa-6.1.10.tar.gz