PlayGround
Sympa is an opensource mailing list manager. It provides advanced features with a rich and secure web interface.
Original features :
- scalable for big mailings lists ( > 700.000 list members)
- list member provisioning using LDAP, SQL or other data sources
- various authentication method (SSO, LDAP, X509)
- S/MIME and DKIM
- web archive with access control, message removal etc
- virtual hosting for service providers.
- automatic bounce management
- easily customizable web interface
- SOAP interface for integration with other applications
More features description.