Frequently Asked Questions

When composing an email are contacts supposed to autocomplete? Currently I am only seeing contacts that are people who are part of groups I have added

If you want to enable this option for ALL users in your domain, then this is done in the Zimbra Administration GUI by updating the relevant Class of Service configuration. If you want to enable this option for an individual account by changing their mailbox preferences.

What are the recommended steps for installing a new CentOS server for Zimbra?

To install a new CentOS 5.6 server x64 / i686, Agilemail recommend the following steps.1. Download and burn to CD or mount the required ISOs. You will only need CD1 and CD3. the ISO images are available on during the installation process:2. You can SKIP the testing of the CD media step. This is not required.3. Make the logical selections for language, keyboard layout and timezone.4. Network should be set to a static IP address.5. Partition as required.6. Unselect ALL default software packages. 7. Choose to Customize Now the software packages. 8. Software packages, select: Base System, Base only. Unselect all others. 9. You should see a confirmation of the required media, CD1 and CD3. If not then go back a step. 10. Continue with the installation.Once the CentOS software has been installed:11. Login as root, run software updates, yum -y updateYou now have an up to date, minimal CentOS server ready for Zimbra installation.

Do I have to install Zimbra on a stand-alone / dedicated server? Or can I use the server for other functions?

Yes you can use the server for other functions. Zimbra installs all the necessary software required to function and so there will be Port conflicts between such common applications as LDAP, web and email services if they are already on the server. The solution in this case is to have the services run on either unique ports or bind to different IP addresses.

How does Zimbra compare to Microsoft Exchange for features and cost?

Here are some resources to help you: Zimbra 7 versus Exchange 2010 (PDF) Embrace and Extend: Making Open Technologies Displace Incumbents in the Enterprise by Kevin Henrikson (good overview of Zimbra) Zimbra vs Microsoft Exchange a feature and cost comparison Zimbra versus Microsoft Exchange 2008 Zimbra versus Microsoft Exchange 2007 ZDNet Australia, Top Alternatives to Microsoft Outlook CNET Apparently Microsoft prefers Zimbra, too CNET Microsoft’s curious infatuation with Zimbra, redux We have also collated various Zimbra presentations and these are available on There is also a great collection of case studies and webinars available at Agileware can also provide customer references, trials and consulting to help you with your business case.

Can I upgrade from Zimbra Open Source to Zimbra Standard or Professional?

Yes, you can easily upgrade from Zimbra Open Source to Zimbra Standard or Professional Edition. Downgrades from Zimbra Standard or Professional to Zimbra Open Source work too!

Are there any Zimbra product comparison or feature list data sheets?

Zimbra Editions Feature List (PDF) Zimbra Collaboration Suite Data Sheet (PDF) Compare the Zimbra Community (free & open source) and Zimbra Network Editions

Is Zimbra secure? What security features does it have?

Zimbra has a lot of security features and out of the box, running on a properly configured Linux server with secure passwords Zimbra is very secure. Read this page for more details, Zimbra security.

Are there any large installations of Zimbra in Australia?

Yes, Westnet Australia have 300,000 mailboxes soon to be 1 million. From Westnet’s website – Westnet has carefully selected Zimbra, who are the leader in next-generation messaging and collaboration software, for this webmail platform software. Zimbra’s market changing approach to messaging and collaboration has received significant recognition in the industry.