Kerio MailServer supports three types of operating systems. You can choose from Windows, Mac OS X and Linux.

List of versions (or distribution packs) of the operating systems supported by Kerio MailServer can be found at Kerio Technologies website (http://www.kerio.com/kms).

It is necessary to install a special additional installation package on any operating system (as for Linux, two packages are in question). All installation packages can be downloaded from the Kerio Technologies website at http://www.kerio.com/kmsdwn/.

Once a corresponding installation package is downloaded, the installation can be started. Installations differ by operating system: