It is recommended to upgrade to Kerio MailServer 6.x from Kerio MailServer 5.7.10.

Kerio MailServer can be installed on one of these operating systems:

Microsoft Windows

Installation can be performed on Windows 2000, XP and 2003. After running the installation program a window will be displayed where you can import available settings from WinRoute Pro 4.x. For details about this wizard, refer to chapter Configuration Wizard.

Note:If you use WinRoute Pro 4.x and you want to import the settings, stop the WinRoute Engine service before starting the Kerio MailServer installation (all the settings will be saved to the system registry).

Warning:Don't perform Kerio WinRoute uninstallation all the settings would be lost!

The first step during the installation is a language selection. It is relevant only to the installation program.

Figure 1. Installation language selection

The next step is a selection of an installation type. The following types are available:

Figure 2. Installation custom install
  • Typical complete installation

  • Minimal minimal installation

  • Custom selection of Kerio MailServer components which will be installed as well as of a language of the Kerio MailServer's help. If you enable both English and Czech, the help will be displayed in the language version which is set in the Kerio Administration Console. If the language in the Kerio Administration Console is changed, the language in the help is switched automatically.

Note:If you upgrade the current installation, notice that the installation program works in the following way:

  • all selected components will be installed or updated

  • all non-selected components will not be installed or uninstalled (if they are already installed)

All components which should be preserved must be selected.

After this step, the installation continues (i.e. files are copied to a hard drive and all necessary system settings are performed). Then the wizard for the basic server parameters settings is run.

After installation process is completed successfully, the configuration wizard will be started. Insert primary domain name and password for administration.

Kerio MailServer Engine, which is the mail server's core, running as a service, will be started immediately after the installation is complete. This implies that a utility called Kerio MailServer Monitor will also be run, by which you can view the Engine status, stop or start the mail server and perform other tasks. Kerio MailServer Monitor is displayed as an icon in the SysTray.

Figure 3. Kerio MailServer Monitor


Kerio MailServer supports Red Hat 9.0, Red Hat Enterprise Linux 3 and Fedora Core distributions, version 9.0 and above, and SuSE Linux, version 9.x and above.

Kerio MailServer is distributed in the following two RPM (RedHat Package Manager) packages:

  • kerio-mailserver-6.0.5-linux.i386.rpm the core of the server (Kerio MailServer Engine)

  • kerio-mailserver-admin-6.0.5-linux.i386.rpm Kerio Administration Console

For the installation root rights are required. Kerio MailServer Engine is installed into the /opt/kerio/mailserver directory, Kerio Administration Console into opt/kerio/admin.

New installation

For the installation use the following command:

# rpm -i <name_of_the_installation_file>


# rpm -i kerio-mailserver-6.0.5-linux.i386.rpm

After installation process is completed successfully, the configuration wizard will be started. Insert primary domain name and password for administration.

How to run/stop the server

A script is created /etc/init.d, which runs the daemon (i.e. MailServer Engine) automatically during bootup. This utility also allows you to start or stop the daemon manually:

/etc/init.d/keriomailserver start


/etc/init.d/keriomailserver stop


Kerio Administration Console is run with the command kerioadmin. X-Window is required.

Administration of Kerio MailServer is platform independent. KMS running under the Linux operating system can be administered from the Microsoft Windows version of the Kerio Administration Console and vice versa.

Mac OS X

The installation program can be run only after successful authentication (only authorized users can install applications in the system).

Figure 4. User authentication

If you confirm the licensing policy you will be allowed to select an installation type. The Easy Install type is already predefined. Within the Custom Install type you can select individual components that you would like to install (Kerio Administration Console, Kerio MailServer Engine and Administrator's Guide are available). To uninstall the application, choose the last option.

Figure 5. Installation type selection

Select an installation type (the Easy Install option will install all available components) and wait until the installation process is finished. Complete version of Kerio MailServer will be installed (Kerio Administration Console, Kerio MailServer Engine and Administrator's Guide).

Figure 6. Installation custom install

After installation process is completed successfully, the configuration wizard will be started. Insert primary domain name and password for administration.

Click on the OK button at the information window to open the Kerio MailServer folder. This folder includes the Administration Console executable, Administrator's Guide in PDF format and link to MailServer files where definition files for the Kerio WebMail interface are contained.

Figure 7. Kerio MailServer folder

Kerio MailServer will be run automatically after the operating system is booted. However, users must run Kerio MailServer Monitor (located in the Kerio MailServer folder). Username which must belong to the Admins group and password is required for stopping or running of the service. Once authenticated, clicking Stop or Start is sufficient.

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