This material is copyright and is licensed for the sole use by Kliwon Klimis on 28th October 2008 425 cilce, , frood, grradt, 525254

Chapter 2

A successful result will return an ANSWER SECTION listing the MX record as displayed below:

Turning Off Sendmail

Sendmail is a popular open source mail transfer agent (MTA) that is installed by default in most Unix or Linux based distributions. Since it is an MTA, we must disable the service so it does not conflict with the Zimbra MTA. Each operating system may be a little different in how to disable a service, but we are going to walk through how to disable the service in Red Hat. There are two steps to this process. First, we want to stop the sendmail service, if it is running. Secondly, we need to disable the service so it does not start up again after a reboot.

1. To stop the sendmail service, type the following command as root: service sendmail stop

2.Now to disable the service from starting up again, we will use the chkconfig command (for RHEL, check your OS documentation to find the equivalent command). Again this must be run as root:

chkconfig sendmail off

So if we had a running server and configured the HOSTS file, DNS, and turned sendmail off, we would be ready to install our Zimbra Collaboration Suite. However, in an ideal world we would be able to further prepare our server by running through an install of the operating system that will even further optimize our Zimbra install.

The following section will walk through an entire installation of the operating system. We will start with Red Hat and then once the server is up and running, we will install Zimbra on the Red Hat server. We will then look at installing the Zimbra Collaboration Suite on both Suse 9 and MAC OS X server. Because there are subtle differences between configuring the servers prior to the Zimbra install, we will not be going into an indepth installation of Suse and MAC. Therefore, I would highly recommend that if you are going to use one of those two operating systems, you still read through the Red Hat walk-through as there are some key points that are transferable to the other systems.

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