Title: S/MIME and Sympa mailing lists manager
- Sympa version provides security way based on S/MIME : digital signature and messages distribution process using encryption. Sympa's web interface can use HTTPS authentication based on user X509 certificates.
- http://www.sympa.org/documentation/article_smime/sympasmime.html

Shibboleth
- A privacy and security aware mailing list manager, for allowing closed groups to interact on the Internet without interference from outsiders and former insiders. Open source in PERL.
- http://shibboleth.sourceforge.net

Sympa
- Mailing List Server for managing small Intranet as well as large ISP lists services. Supports S/MIME and cryptography.
- http://listes.cru.fr/sympa/