Zarafa, which is part of the OpenMapi.org initiative, has just released
its core products as Open Source. OpenMapi.org is working on a backend
for its NMapi library to support connecting to a Zarafa MAPI server,
providing a complete open source software stack for OpenMapi.org
clients.

For more information, please see the press release:

18 Sept. Number one Exchange replacement Zarafa releases software Open Source