Debian and OpenSUSE packages for Kopano
The Debian Developers Carsten Schoenert and Guido Günther are currently busy packaging and updating Kopano Core and Kopano WebApp for inclusion in the upcoming Debian release (Debian Buster). Additionally Debian Maintainer Roel van Meer is busy repackaging Z-Push for inclusion in the official Debian repositories. When running Debian Testing or Unstable Kopano can already be installed, see https://packages.debian.org/search?keywords=kopano for a list of packages available.
A general overview of the ongoing changes can be found at https://wiki.debian.org/Groupware/Kopano
Meanwhile the OpenSUSE community has also been busy and Kopano is already available OpenSUSE Tumbleweed and Leap 42.3. An Overview of all SUSE releases that provide Kopano packages can be found at https://software.opensuse.org/package/kopano.