Danny Allen is a full-stack web developer who focuses on usability, localization, and accessibility issues as a founder and director of the user experience development consultancy, Wonderscore Ltd.

He is skilled across a wide range of technology including PHP, Python, JavaScript, HTML5, and CSS3. His recent work has involved design and implementation of e-learning and government projects in the United Kingdom.

He first encountered Zimbra many years ago when he wanted to set up his own e-mail server to handle the domains of his many side projects. At the time, Zimbra was not easy to set up—a book like this would have saved hours of frustration and been most helpful!

Viorel Anghel is an experienced system and network administrator with more than 15 years of experience in Linux and Unix. He is interested in high scalability, availability, and infrastructure management tools.

He is currently doing consulting work through Gemini Solutions (www.GeminiSols.com).

Maarten Vekens is a 32-year-old freelance system administrator. He is currently living currently in Brussels, Belgium.

He is an amateur cyclist who travels around the world and enjoys the cultural life.

He started his IT career 14 years ago, at one of the biggest Petrochemical companies in the world. After some other projects, he was asked to join the IT staff at Belga News Agency. During this project, he started to work with VMware Zimbra.

In 2012, he started his own company, TakeIToff (www.takeitoff.be), together with his best friend, Vincent Oomen. The main focus stays on system administration and program management.