Zimbra™ Launches Zimbra Collaboration Suite 6.0; Reaches 50 Million Paid Mailboxes

Industry’s Most Flexible Collaboration Suite Expands Open Platform and Delivers Best-in-Class Enterprise Features That Create Personally Relevant Experiences for Millions of Customers Worldwide

SUNNYVALE, Calif. - September 30, 2009 Zimbra, a division of Yahoo! Inc. (Nasdaq:YHOO) and the leader in open source, next-generation e-mail and collaboration software, today announced the launch of Zimbra Collaboration Suite (ZCS) 6.0. The most significant upgrade to the Zimbra software to date, ZCS 6.0 further extends the open Zimlet platform to third-party developers and improves enterprise collaboration through a host of new community-driven features such as expanded calendaring, sharing and enhanced mobile support – ideal enhancements for Zimbra’s business, service provider, education and open source customers.

“We’ve crossed a huge milestone, reaching 50 million paid mailboxes in less than four years – our explosive growth is fueled by the support and feedback of our diverse community of customers, developers, and partners,” said Jim Morrisroe, Yahoo! vice president and general manager, Zimbra. “Key features in ZCS 6.0 were determined by thousands of votes from the Zimbra community, enabling us to build a premier e-mail and collaboration suite to address top requests, meet market demand, and position us to continue our strong global growth.”

As part of ZCS 6.0, Zimbra will further open its innovative application platform, including the Zimlet and Mobile application programming interfaces (APIs), to provide maximum flexibility to Zimbra’s community of customers, partners, and developers. With the new Zimlet platform, a Zimbra customer or partner can build out fully featured applications directly within the collaboration suite, which pulls in information from third party sources. For example, a new VoIP Zimlet from Broadsoft enables a unified communications experience for Zimbra hosting partners. In addition, a new social media Zimlet enables users to read and post tweets to Twitter, and manage updates from Facebook®, and Digg directly from within their ZCS inbox. Extending the Zimbra platform with new applications keeps people connected to what matters most right from their inbox, saving time and the need to visit multiple websites.

New features in ZCS 6.0 include:

  • Increased productivity – Three pane e-mail view and the ability to compose e-mail in separate tabs; enhanced calendar functionality and improved visual view of appointments, including a “fish-eye” zoom-in feature within calendar; read receipts assuring that e-mail has been read; improved file and sharing management; customized rules and filters on current e-mails and ability to sort e-mail message by size; conveniently attach any file from Zimbra Briefcase to e-mail and manage shared documents or folders.
  • Enhanced mobile experience – Mobile device management and security features such as remote device wipe to protect sensitive information; ability to search the Global Address List on your mobile device; and many mobile browser enhancements such as create and edit contacts, create appointments, save searches, and access Zimbra Documents and Briefcase.
  • Administrator benefits – Improved administration with role-based delegation at multiple administrator levels, choice of access rights, distribution list management, and permission management; domain management with the ability to manage multiple domains; and new alerts warning when storage disk reaches close to full capacity.
  • Integrated mash-up experience – New Zimlet tab allows customers or partners to integrate third-party web applications, offering better customization and control of mash-ups in Zimbra.

Zimbra continues to be the fastest-growing enterprise collaboration solution with more than 50 million paid mailboxes, representing 165 percent year-over-year growth1. Zimbra is now among the largest business collaboration providers along with Microsoft and IBM, and is the largest on-premises open source collaboration suite in paid mailboxes2. Zimbra is now used by more than 100,000 organizations worldwide, with thousands of new customers this year, including:

  • Agora SA
  • Bechtel Corporation
  • Chapdelaine & Co., Inc.
  • Department of Forestry, Chile
  • Detroit Public Library System
  • Dobson Telephone Company
  • Drug Enforcement Administration (DEA)
  • Eastern Michigan University
  • Ecole Polytechnique de Montreal
  • EPB Telecom
  • Federal Administration of Public Revenue (AFIP), Argentina
  • Geokinetics
  • Marietta College
  • Ministry of Foreign Affairs, Greece
  • Ministry of Health, Oman
  • News Press & Gazette Company (NPG)
  • Saint Joseph’s University
  • Savannah College
  • SRT Communications
  • Swarthmore College
  • Tung Wah Hospitals, Hong Kong
  • University of Findlay
  • Wayne State
  • WebMD

“We did an exhaustive evaluation of new collaboration platforms to pair with Microsoft Outlook, including those from all the major software vendors,” said Bartek Brzozowski, Data Center Manager, Agora SA. “Because Zimbra Collaboration Suite 6.0 with Zimbra Desktop is so sophisticated, user friendly, and has superior functionality in its web interface, we have chosen this as the exclusive platform for our 3,500 employees.”

Zimbra’s Continued Integration with Yahoo! Mail

Zimbra was acquired by Yahoo! in 2007 with the vision of extending the company’s leadership in messaging (Yahoo! Mail and Calendar) with a range of new capabilities. Since then, the Zimbra backend has played a significant role in Yahoo! Mail and has been used to improve the overall speed and performance of the product. Zimbra’s popular Zimlet technology serves as the inspiration for the third-party applications now available to users of the new Yahoo! Mail. Additionally, Zimbra technology provided the foundation for Yahoo! Calendar’s significant overhaul in October 2008.

About Zimbra

Zimbra, a Yahoo! division, is a leading provider of e-mail and collaboration software for universities, businesses and service providers. Zimbra’s rich AJAX interface is available on or offline to dramatically improve the collaboration experience. Zimbra is available for deployment as on-premises software or on-demand through our extensive e-mail hosting partner program. More information at

About Yahoo!

Yahoo! attracts hundreds of millions of users every month through its innovative technology and engaging content and services, making it one of the most trafficked Internet destinations and a world class online media company. Yahoo!’s vision is to be the center of people’s online lives by delivering personally relevant, meaningful Internet experiences. Yahoo! is headquartered in Sunnyvale, California. For more information, visit or the company’s blog, Yodel Anecdotal (

Media Contact:
Karen Mahon
Yahoo!, Inc
(408) 349-4152

Liz Clinkenbeard
OutCast Communications
(415) 345-4715