Zimbra 9 Open Source build by Zextras

First time installation

Zimbra 9 Open Source build by Zextras has been released, and it is supported by Ubuntu 18, CentOS 7 and CentOS 8 operating systems. In this article, we will walk you through how to install Zimbra 9 OSE on these OS.
CentOS 7 and CentOS 8 are available for download on the official website https://www.centos.org/ of this GNU/Linux distribution.
Ubuntu 18 is available for download on the official website https://ubuntu.com/ of this GNU/Linux distribution.
Zimbra 9 Open Source build by Zextras can be downloaded from the Zextras website https://www.zextras.com/zimbra-9/.

After entering all the necessary contact information, you will receive links to versions of Zimbra 9 OSE for these GNU/Linux distributions by e-mail. You can download them either through a browser or using the “wget” utility. By the way, if you are already using Zimbra OSE 8.8.15, you can use the Zextras build to update your mail server to the new version.

In order to install Zimbra 9 Open Source build by Zextras, you must first prepare the server. The minimum system requirements that Zimbra OSE imposes on the server:

  • 16 gigabytes of RAM
  • 4-core CPU or 4 vCPUs
  • 10 gigabytes of free hard disk space
  • FQDN, MX and A DNS-records
  • Correctly set timezone and NTP
  • Let’s configure the domain name of the server using the sudo hostnamectl set-hostname mail.company.com --static command. Add A and MX records using the dig -t A mail.company.com and dig -t MX company.com commands.

Zimbra 9 Open Source build by Zextras distribution is a .tgz archive. To install it, you must first unpack the archive using the tar zxvf zcs-9.0.0_OSE_RHEL7_latest-zextras.tgz command (for CentOS 7), tar zxvf zcs-9.0.0_OSE_RHEL8_latest-zextras.tgz command (for CentOS 8) or tar zxvf zcs-9.0.0_OSE_UBUNTU18_latest-zextras.tgz command (for Ubuntu 18), go to the folder where the archive was unpacked, and then run the installation script using the sudo ./install.sh command.

At the very beginning of the installation, the Zimbra 9 Open Source build by Zextras installer will conduct the necessary checks for the presence of a correctly configured domain name, and will also offer to accept the terms of the license agreement. After confirming your consent, the installation will continue.

After that, the installer will prompt you to use the official Zimbra 9 OSE repositories, as well as select the packages to install. As a reminder, the key components are Zimbra Core, Zimbra LDAP, Zimbra MTA, Zimbra Proxy, and Zimbra Store. However, the suggested list of components is much longer and you can install any additional packages.

After finishing the installation of the packages, the Zimbra 9 Open Source build by Zextras Initial Configuration Wizard will open. Since in our case we are performing a single-server installation, we need to set an administrator password in it. To do this, you need to find the item with the name “zimbra-store” in the menu, press the corresponding number and select item 4 in the submenu that opens. After entering the password, you must return to the previous menu using the “r” button and apply the changes made using the “a” button.

The Zimbra 9 Open Source build by Zextras web client will be available at ‘https://mail.company.com’, access to the administrator console is at ‘https://mail.company.com:7071’.

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