Modern mailing list manager

 Sympa is a scalable and highly customizable modern mailing list manager
 capable of handling big setups: 20.000 lists with 700,000 subscribers.
 .
 Here are some of its many features:
  - Advanced MIME support, including digests, anonymization and S/MIME
    encryption
  - Builtin password-based authentication, HTTPS X.509 certificates or
    use of LDAP database or Single Sign-On CAS or Shibboleth servers
  - Archive management with web access and RSS feeds
  - Moderation and administration via email, web and SOAP interface
  - Multi-lingual, translated to more than 30 languages
  - Virtual domains (virtual robots)
  - Local SQLite subscriber database or use of MySQL, PostgreSQL or LDAP
  - Integrated scripting language to extend and automate routines
  - Web interface called WWSympa providing homogenous access for both
    users and admins to list overviews, customization, administration,
    searchable archives and optional web-based email reply form.
  - Clean moderation and expiration processing
  - Customizable service messages (templates) for owner and listmaster
  - Semi-automatic bounces management
 .
 SYMPA is French for 'SYstème de Multi-Postage Automatique', which means
 'Automatic Multi Mailing System'.