 Insert your CentOS install CD into your system and boot from it. Hit Enter to start the installation.

 You are first asked if you would like to test the CD Media. You can choose skip.

 After this the installer starts. Click on Next.

 Next you are asked for language.

 In my case I chose English and it then ask for which English. I'm in the US so I choose US English.

 A box pops up warning you about initializing the drive.

 No changes need to be made on the next screen.

 Again you are warned of the iminent doom of your disk.

 Network Devices gives you the opportunity to enter IP address information for your network. Keep in mind that you cannot run an email server using DHCP. Use the edit button and enter information appropriate for your network. Don't forget to enter your gateway and nameservers as well.

 Manually: mail.trustbank.com.vn
 Gateway:
 Primary DNS:
 Next you are asked for your time zone.

 Enter a password for the root account.

 Now it is time to choose the packages to install. Uncheck all boxes in the upper pane and check the box for the CentOS Extra Packages in the lower pane. Click the radio button for Customize Now and click Next

 A box will pop up verifying your IP address information. The next screen allows you to choose packages for your installation. You want the following packages:
Text-based Internet
Development Libraries
Development Tools
Legacy Software Development
Base System
Legacy Software Support

 Once you have selected the pacakages click Next and it will search for dependencies.

 It is now ready to begin the installation. Click Next to begin.

 The installation should only take a few minutes because we are installing the bare minimum.

 Click on Reboot once the installation is finished. Be sure to remove your installation CD as well.

 Once the system reboots you are presented with the firstboot screen. This feature is very helpful because it allows you to make changes to the firewall. Using the keyboard choose Firewall click tab to move to the Run Tool button and hit enter.

 For Security Level choose disabled and choose disabled for SELinux as well. Choose OK.

 Now you are back at the main firstboot screen. You can tab to the Exit button.
 Please note that we have now disabled all security on this box. If this computer is not behind a firewall it could be compromised quite easily.
 The last step is to shutoff some services that will interfere with ZCS.
chkconfig sendmail off
chkconfig ip6tables off
chkconfig iptables off
 We need one package before we can continue:
yum install libtool-ltdl
 This completes the base installation of CentOS. On the next page we will setup Split DNS which is essential for ZCS. Go ahead and reboot, and fill up that coffee cup.
II. Installation Of Split DNS
This part of installation is working off of the assumption that you are behind a firewall. If you are not behind a firewall (not recommended) you can skip this part of the installation.
yum install bind bind-chroot bind-libs bind-utils
REMINDER: Be sure to use the ip address and hostname/FQDN that is appropriate for your installation.
 Create the /var/named/chroot/etc/named.conf file:
vi /var/named/chroot/etc/named.conf
options {
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
forwarders { ; };
include "/etc/rndc.key";
zone "test.com" {
type master;
file "db.trustbank.com.vn";
The ip address for forwarders should be the ip address of your dns server.
 Now you need to create your /var/named/chroot/var/named/db.test.com file
vi /var/named/chroot/var/named/db.test.com
$TTL 14400
@ IN SOA mail.test.com. root.test.com. (
86400 )
; Define the nameservers and the mail servers

IN NS ns1.test.com.
IN MX 10 mail.test.com.

Ns1 14400 IN A
test.com. 14400 IN A
Localhost 14400 IN A
test.com. 14400 IN A
Test.com Web Based Testing Software. 14400 IN A
 Change your resolv.conf to use your mail server's IP address as it's primary DNS.
vi /etc/resolv.conf
search test.com
 Start named on your server
/etc/init.d/named start
 Enable autostart for named.
chkconfig named on
 To verify that it is working do the following:
nslookup mail.test.com
It should return something similar to this:
Name: mail.test.com
Notice that the ip address returned is the same as the local machine. That means success.
Now we can move on to installing ZCS.
III. Installation Of Zimbra Collaboration Suite

 You will need to download ZCS from the Zimbra website.
cd /tmp wget http://files.zimbra.com/downloads/5....0130221917.tgz
 Next untar, change into the directory of the installer and run the installer.
tar xvzf zcs-5.0.2_GA_1975.RHEL5.20080130221917.tgz
cd zcs-5.0.2_GA_1975.RHEL5.20080130221917
 The output should look something like:
Checking for existing installation...
zimbra-ldap...NOT FOUND
zimbra-logger...NOT FOUND
zimbra-mta...NOT FOUND
zimbra-snmp...NOT FOUND
zimbra-store...NOT FOUND
zimbra-apache...NOT FOUND
zimbra-spell...NOT FOUND
zimbra-proxy...NOT FOUND
zimbra-archiving...NOT FOUND
zimbra-cluster...NOT FOUND
zimbra-core...NOT FOUND
 Read through the license agreement and hit enter.
The output should be similar to:
Checking for prerequisites...
sudo...FOUND sudo-1.6.7p12-10
libidn...FOUND libidn-0.6.5-1.1
fetchmail...FOUND fetchmail-6.3.6-1.1
gmp...FOUND gmp-4.1.4-10
compat-libstdc++-296...FOUND compat-libstdc++-296-2.96-138
compat-libstdc++-33...FOUND compat-libstdc++-33-3.2.3-61
libtool-ltdl...FOUND libtool-ltdl-1.5.22-6.1
Prerequisite check complete.
Checking for standard system perl...
perl-5.8.8...FOUND start system perl-5.8.8

Checking for installable packages

Found zimbra-core
Found zimbra-ldap
Found zimbra-logger
Found zimbra-mta
Found zimbra-snmp
Found zimbra-store
Found zimbra-apache
Found zimbra-spell
Found zimbra-proxy
 Next you need to select the packages to install. The defaults are listed in teh brackets so you can just press enter for every question.
Install zimbra-ldap [Y]

Install zimbra-logger [Y]

Install zimbra-mta [Y]

Install zimbra-snmp [Y]

Install zimbra-store [Y]

Install zimbra-apache [Y]

Install zimbra-spell [Y]

Install zimbra-proxy [N]
 You will see a warning like this:

You appear to be installing packages on a platform different
than the platform for which they were built

This platform is CentOS5
Packages found: zimbra-core-5.0.2_GA_1975.RHEL5-20080130221917.i386.rpm
This may or may not work

Install anyway? [N] Y

The system will be modified. Continue? [N] Y

 The installation takes a little bit so if you are running low on coffee or need a potty break now is the time to take it.
 Once the install is finished you are presented with the Main Menu. It looks like this:

 Notice the asterisks next to the Admin Password. You need to set the Admin Password before you complete the install. To do this enter 3 at the prompt and hit enter. The menu changes to:

 Now you choose 4. You will be prompted to change the password. After you change the password hit r which will take you back to the previous menu. Enter a at the prompt to save the configuration.
 The installation will complete and you will be all set to access the administrative web interface.

 ZCS Admin Web Interface

 Administration Login

 You can access the admin web interface by going to https://you.domain.com:7071.
Note: The web interface is accessed via ssl. Make sure you put https otherwise you won't be able to access the site.

 The web interface is fairly easy to navigate.

 Log in with your full email address and the password that you set for it.


 Download file Webmin…noarch.rpm

$ rpm –U webmin….noarch.rpm

 Configure Fetchmail on webmin first
 Configure Fetchmail in ~/.fetchmailrc with script:

set no bouncemail
set logfile “/var/log/fetchmail”
set postmaster postmaster@test.com
set daemon 0
poll mailserver4.pavietnam.vn with protocol pop3, with options
localdomains test.com
no dns
envelope Envelope-to
user “user_login_pop@test.com” “password” is * here
with options rewrite mimedecode fetchall pass8bits

 Set schedule fetchmail


(Set SMTP Relay to use ISP for mail relay)
 Set mailrelay MTA in Global setting (in Zimba admin web console)
 Config smtp relay (/opt/zimbra/postfix-2.2.3/conf/main.cf)

$ su zimbra
$ postconf –e smtp_sasl_auth_enable=yes
$ echo mailserver4.pavietnam.vn username@test.comassword > /opt/zimbra>conf>relay_password
$ postmap /opt/zimbra/conf/relay_password

# test that the map is okay
$ postmap –q mailrelay.pavietnam.vn /opt/zimbra/conf/relay_password
# that should return username@test.comassword if done right

# make postfix use the above
$ postconf –e smtp_sasl_password_maps=hash:/opt/zimbra/conf/relay_password

$ postfix reload

$ postconf –e smtp_sasl_security_options=noanonymous