Zarafa is an opensource groupware solution.
- agenda (private/global)
- calendar (shared, delegations)
- webmail, mobile phones (active sync), plugin for outlook
- video chat (also groups)
- can interface to postfix, exim and others (so that you can integrate it with e.g. existing anti-spam-solutions, virusscanners, etc)
- gateway for pop3 and pop3s (pop3 over SSL)
- gateway for imap, imaps (imap over SSL)
- caldav gateway
- ical gateway
- support for all major browsers
- support for all functionality of the zarafa suite
- video chat (one-on-one and in a group) without plugin (via webrtc)
Via "active sync".
- microsoft telephone
plugin for outlook
Gives the full outlook-experience only with a zarafa server backend.
Web chat in your browser. No plugin required, only webrtc (which is included in at least google chrome and firefox).
- group chats
- also for people who do no have an account on your server