The Zimbra email and collaboration suite
will change its open source policy. This post from the
Zeta Alliance notes the changes for Zimbra 9. “John E. explained
that Zimbra 9 introduces a change to Synacor’s open source policy for
Zimbra. Starting with Zimbra 9, a binary version of Zimbra 9 will no longer
be released to the community and will instead only be made available to
Zimbra Network Edition customers. There are currently no plans to release
the source code for Zimbra 9 to the community. Zimbra 8.8.15 will remain
open source for the community and continue to be supported for the
remainder of its lifecycle through December, 31, 2024 (https://www.zimbra.com/support/support-
… lifecycle/). Version 8.8.15 will also continue to receive patches
during this time frame. John E. described this new model for Zimbra 9 as
“open core” where the open source products on which Zimbra is built will
continue to be freely available, but the Zimbra 9 product itself will not
be open source.” (Thanks to Emmanuel Seyman)

Source: LWN.net – Changes To Zimbra’s Open Source Policy