Zimbra 9 Open Source Edition build by Zextras

This is legacy documentation that is not updated anymore. For the most up to date version, please refer to our Documentation Hub


Everyday, Zextras builds Zimbra and Zextras towards Zimbra: since the rise of our company, we have always written code that is integrated into Zimbra. The deep knowledge of Zimbra gave us the confidence to take the responsibility of building and maintaining a professional Zimbra 9 Open Source Edition (Zimbra 9 OSE) based on Zimbra’s official repositories: welcome to the Zimbra 9 Open Source build by Zextras.

This section contains important information about Zimbra 9 OSE and its use.

A message from Paolo Storti, CEO @ Zextras

In the late ‘90s I’ve started to work as Linux System administrator. Lately I’ve focused on providing Open Source email solutions: during this period, the struggle is real. Integrating and maintaining a multitude of heterogeneous components was an ongoing challenge, nights and days spent on finding the way to provide a suitable solution.

Some years later Zimbra broke into the scene and this was definitely the turning point for me: I immediately fell in love with the chance to provide a solution maintained as a single project in which all the pieces fit perfectly together.

As a communication systems fan and Open Source supporter, I’ve found in Zimbra everything I’ve always dreamt of. This is the reason why I’ve decided to give continuity to this project I strongly believe in, by making available the Zimbra 9 Open Source build by Zextras.

— Paolo Storti
CEO @ Zextras

Zimbra 9 Open Source Edition by Zextras

While the Zimbra 9 source code is publicly available, some of its components are not. Hence, Zextras and its development teams decided to build their own version of Zimbra 9 with the purpose to provide a better integration of Zextras with Zimbra and improve the user experience with unique features. Therefore, Zextras provides unofficial builds of Synacor’s Zimbra 9 under the applicable Zimbra Open Source Licenses.

Zimbra 9 Open Source Edition by Zextras Builds can be downloaded for free from the dedicated page.

Compatibility and Technical Details

Zimbra 9 Open Source Edition (OSE) by Zextras is the only Zimbra 9 build supported by Zextras Suite.

For compatibility of Zextras Suite with other Zimbra versions, please refer to the Zextras Compatibility List.

Compatibility with self or user-compiled Zimbra builds is not supported.

Support and General Availability

The Zimbra 9 OSE by Zextras is not an officially supported Zextras Product.

Zimbra 9 OSE by Zextras is provided AS IS and does not fall under the list of products for which Zextras provides technical support, namely Zextras Suite and Zextras Team.

The Zimbra 9 Open Source Edition by Zextras software is provided AS IS and based on the source code publicly available at https://github.com/Zimbra/.

Zimbra is a trademark of Synacor. No endorsement is claimed or implied from Zimbra, Synacor or any of their employees or company officers.

Synacor and Zextras as independent, unaffiliated companies. Zextras provides proprietary extensions to the open source version of Zimbra, that can be found at https://store.zextras.com/.

Community Articles:

A whole section of our Community is dedicated to articles for Zimbra OSE.