- .
- Features:
- * Email, calendaring, address books, bulletin boards, instant messaging, and
- more ... all in one tightly integrated server package. Unlike other
- open source groupware systems, all of Citadel's data stores are built-in.
- "Integrate-it-yourself" is a thing of the past.
- * High-performance, multiprotocol, multithreaded server engine
- * Web browser, telnet/SSH, local client software accessible
- * Standards-compliant e-mail built in: IMAP, POP3, ESMTP
- * Group calendaring and scheduling (GroupDAV, Aethera, and Kolab-1
- compatible)
- * Built-in listserv (mailing list server)
- * Database-driven, single-instance message store
- * Authenticated SMTP (no more tedious mucking about with POP-before-SMTP
- hacks)
- * Multiple domain support
- * Built-in integration with perimiter email filtering technologies such as
- Realtime Blackhole Lists (RBL's) and SpamAssassin
- * Very strong replication features. Users in any number of domains can be
- spread out across any number of Citadel servers, allowing you to put data
- where you need it, and enabling infinite horizontal scalability.
- * Web-based access to email, calendars, and everything else through
- a powerful AJAX-style front end
- * Very strong support for "public folders" and message forums.
- * Built-in instant messenger service
- * SSL/TLS encryption for all protocols
- * LDAP integration capabilities. Citadel can populate your existing directory
- server, or it can configure a standalone directory server if you don't
- already have one.
- .
- Homepage: http://www.citadel.org