Install Zimbra on Ubuntu 20.04 Step by Step

In my last article on Zimbra, I already discussed the installation of Zimbra on Centos 7/8. In this article, you will learn to install Zimbra on Ubuntu 20.04/21.04.

Zimbra is open source mailing solution developed by Synacor. It has another edition as well which is the Network edition. However, Zimbra Open source is used by many universities and big companies.

Basically, Zimbra is the best alternative to paid Google Workspace, Office 365, Zoho mail, etc. So, if you like to have your own email server without any fuss, then you should look no further.

Zimbra – System Requirement

But your system should meet the following minimum configuration as per the Zimbra documentation.

  • CPU – 1.5 GHz
  • Memory – 8 GB
  • Storage – 5 GB for ZCS installation

Initial Domain Setup

First of all create 2 DNS entries in the domain records as follows

TypeHostValue
Amail1.2.3.4
MX@mail.inguide.in 10

Initial Server Setup

First of all, switch to the root user, just in case you not working as the root user.

root@vmi928964:~# sudo -i

Next, update and upgrade Ubuntu

root@vmi928964:~# apt update && apt upgrade -y

After that, set the hostname

root@vmi928964:~# hostnamectl set-hostname mail.inguide.in
root@vmi928964:~# sudo -i

Now, you need to edit Ubuntu Hosts file

root@mail:~# nano /etc/hosts

The hosts file should contain

127.0.0.1       localhost
127.0.1.1       mail.inguide.in mail
38.242.142.57   mail.inguide.in mail

Install Dnsmasq

Next, we need to install Dnsmasq to create and manage a few DNS records required by Zimbra. We also need to disable systemd-resolve in order to avoid conflict between dnsmasq and systemd-resolve

root@mail:~# systemctl disable systemd-resolved
root@mail:~# systemctl stop systemd-resolved

After disabling, systemd-resolve you need to edit resolv.conf to include the Google DNS server. It’s easy, but on some VPS this config file reset to the default value after reboot or upgrade. Therefore, we are going to first unlink it, then include our content.

root@mail:~# ls -lh /etc/resolv.conf
lrwxrwxrwx 1 root root 39 Jan 20  2021 /etc/resolv.conf -> ../run/systemd/resolve/stub-resolv.conf

You can see it’s symlinked and therefore in order to remove it

root@mail:~# rm -f /etc/resolv.conf

Now create your own resolv.conf

root@mail:~# nano /etc/resolv.conf

Next, insert the following content

nameserver 8.8.8.8

Save and exit with CTRL + X

Now install Dnsmasq

root@mail:~# apt install dnsmasq -y

Configuring Dnsmasq

Take the backup of the existing Dnsmasq config file and edit the file

root@mail:~# cp /etc/dnsmasq.conf /etc/dnsmasq.conf.bak
root@mail:~# nano /etc/dnsmasq.conf

Insert the following content at the bottom and don’t forget to replace the IP address and domain name

server= 38.242.250.63
domain=inguide.in
mx-host= inguide.in, mail.inguide.in, 5
mx-host= mail.inguide.in, mail.inguide.in, 5
listen-address=127.0.0.1

Now save the file. If you run the dig the command you should get the following output

root@mail:~# dig -t A mail.inguide.in

; <<>> DiG 9.16.1-Ubuntu <<>> -t A mail.inguide.in
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15272
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;mail.inguide.in.              IN      A

;; ANSWER SECTION:
mail.inguide.in.       1799    IN      A       38.242.250.63

;; Query time: 31 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sun Jul 10 14:59:46 CEST 2022
;; MSG SIZE  rcvd: 61

Next, MX dig should return

root@mail:~# dig -t MX inguide.in

; <<>> DiG 9.16.1-Ubuntu <<>> -t MX inguide.in
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4658
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;inguide.in.                   IN      MX

;; ANSWER SECTION:
inguide.in.            1799    IN      MX      10 mail.inguide.in.

;; Query time: 35 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sun Jul 10 14:59:05 CEST 2022
;; MSG SIZE  rcvd: 61

Installing Zimbra Open Source Edition

Now, you need to download Zimbra OSE with the following command. You can always get the latest file from Zimbra Website.

root@mail:~# wget https://files.zimbra.com/downloads/8.8.15_GA/zcs-8.8.15_GA_4179.UBUNTU20_64.20211118033954.tgz

Next, you have to extract the content

root@mail:~# tar xvzf zcs-8.8.15_GA_4179.UBUNTU20_64.20211118033954.tgz

It’s time to install Zimbra

root@mail:~# cd zcs-8.8.15_GA_4179.UBUNTU20_64.20211118033954
root@mail:~/zcs-8.8.15_GA_4179.UBUNTU20_64.20211118033954# ./install.sh

You will be asked to agree to license and a few other questions to whom you have to answer as follows

Do you agree with the terms of the software license agreement? [N] y

Use Zimbra's package repository [Y] y

Warning: apt-key output should not be parsed (stdout is not a terminal)
Importing Zimbra GPG key

Configuring package repository

Checking for installable packages

Found zimbra-core (local)
Found zimbra-ldap (local)
Found zimbra-logger (local)
Found zimbra-mta (local)
Found zimbra-dnscache (local)
Found zimbra-snmp (local)
Found zimbra-store (local)
Found zimbra-apache (local)
Found zimbra-spell (local)
Found zimbra-memcached (repo)
Found zimbra-proxy (local)
Found zimbra-drive (repo)
Found zimbra-imapd (local)
Found zimbra-patch (repo)
Found zimbra-mta-patch (repo)
Found zimbra-proxy-patch (repo)

Select the packages to install

Install zimbra-ldap [Y] y

Install zimbra-logger [Y] y

Install zimbra-mta [Y] y

Install zimbra-dnscache [Y] n

Install zimbra-snmp [Y] y

Install zimbra-store [Y] y

Install zimbra-apache [Y] y

Install zimbra-spell [Y] y

Install zimbra-memcached [Y] y

Install zimbra-proxy [Y] y

Install zimbra-drive [Y] n

Install zimbra-imapd (BETA - for evaluation only) [N] n

Install zimbra-chat [Y] n
Checking required space for zimbra-core
Checking space for zimbra-store
Checking required packages for zimbra-store
zimbra-store package check complete.

Zimbra will ask for confirmation of installation

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

Beginning Installation - see /tmp/install.log.UUJ9kVuj for details...

                          zimbra-core-components will be downloaded and installed.
                            zimbra-timezone-data will be installed.
                   zimbra-common-mbox-conf-attrs will be installed.
                          zimbra-common-core-jar will be installed.
                  zimbra-common-mbox-conf-rights will be installed.
                         zimbra-common-core-libs will be installed.
                    zimbra-common-mbox-conf-msgs will be installed.
                           zimbra-common-mbox-db will be installed.
                         zimbra-common-mbox-docs will be installed.
                   zimbra-common-mbox-native-lib will be installed.
                         zimbra-common-mbox-conf will be installed.
                                     zimbra-core will be installed.
                          zimbra-ldap-components will be downloaded and installed.
                                     zimbra-ldap will be installed.
                                   zimbra-logger will be installed.
                           zimbra-mta-components will be downloaded and installed.
                                      zimbra-mta will be installed.
                      zimbra-dnscache-components will be downloaded and installed.
                                 zimbra-dnscache will be installed.
                          zimbra-snmp-components will be downloaded and installed.
                                     zimbra-snmp will be installed.
                         zimbra-store-components will be downloaded and installed.
                       zimbra-jetty-distribution will be downloaded and installed.
                          zimbra-mbox-store-libs will be installed.
                                zimbra-mbox-conf will be installed.
                   zimbra-mbox-admin-console-war will be installed.
                                 zimbra-mbox-war will be installed.
                       zimbra-mbox-webclient-war will be installed.
                             zimbra-mbox-service will be installed.
                                    zimbra-store will be installed.
                        zimbra-apache-components will be downloaded and installed.
                                   zimbra-apache will be installed.
                         zimbra-spell-components will be downloaded and installed.
                                    zimbra-spell will be installed.
                                zimbra-memcached will be downloaded and installed.
                         zimbra-proxy-components will be downloaded and installed.
                                    zimbra-proxy will be installed.
                                    zimbra-patch will be downloaded and installed                                                                                                                                                                                                             (later).
                                zimbra-mta-patch will be downloaded and installed                                                                                                                                                                                                             (later).
                              zimbra-proxy-patch will be downloaded and installed                                                                                                                                                                                                             (later).

Downloading packages (11):
   zimbra-core-components
   zimbra-ldap-components
   zimbra-mta-components
   zimbra-dnscache-components
   zimbra-snmp-components
   zimbra-store-components
   zimbra-jetty-distribution
   zimbra-apache-components
   zimbra-spell-components
   zimbra-memcached
   zimbra-proxy-components
      ...done

Removing /opt/zimbra
Removing zimbra crontab entry...done.
Cleaning up zimbra init scripts...done.
Cleaning up /etc/security/limits.conf...done.

Finished removing Zimbra Collaboration Server.

Now on the next screen, it will ask you to set Master DNS IP address and Admin Password

Main menu

   1) Common Configuration:
   2) zimbra-ldap:                             Enabled
   3) zimbra-logger:                           Enabled
   4) zimbra-mta:                              Enabled
   5) zimbra-dnscache:                         Enabled
******* +Master DNS IP address(es):            UNSET
        +Enable DNS lookups over TCP:          yes
        +Enable DNS lookups over UDP:          yes
        +Only allow TCP to communicate with Master DNS: no                        

   6) zimbra-snmp:                             Enabled
   7) zimbra-store:                            Enabled
        +Create Admin User:                    yes
        +Admin user to create:                 admin@mail.inguide.in
******* +Admin Password                        UNSET
        +Anti-virus quarantine user:           virus-quarantine.c73xqgvr@mail.inguide.in
        +Enable automated spam training:       yes
        +Spam training user:                   spam.g1kkn_0g6l@mail.inguide.in
        +Non-spam(Ham) training user:          ham.tzkyhmqk2a@mail.inguide.in
        +SMTP host:                            mail.inguide.in
        +Web server HTTP port:                 8080
        +Web server HTTPS port:                8443
        +Web server mode:                      https
        +IMAP server port:                     7143
        +IMAP server SSL port:                 7993
        +POP server port:                      7110
        +POP server SSL port:                  7995
        +Use spell check server:               yes
        +Spell server URL:                     http://mail.inguide.in:7780/aspell.php
        +Enable version update checks:         TRUE
        +Enable version update notifications:  TRUE
        +Version update notification email:    admin@mail.inguide.in
        +Version update source email:          admin@mail.inguide.in
        +Install mailstore (service webapp):   yes
        +Install UI (zimbra,zimbraAdmin webapps): yes

   8) zimbra-spell:                            Enabled
   9) zimbra-proxy:                            Enabled
  10) Default Class of Service Configuration:
   s) Save config to file
   x) Expand menu
   q) Quit5

Answer it as follows

Address unconfigured (**) items  (? - help) 5


DNS Cache configuration

   1) Status:                                  Enabled
** 2) Master DNS IP address(es):               UNSET
   3) Enable DNS lookups over TCP:             yes
   4) Enable DNS lookups over UDP:             yes
   5) Only allow TCP to communicate with Master DNS: no

Select, or 'r' for previous menu [r] 2

IP Address(es) of Master DNS Server(s), space separated: 8.8.8.8

Next set Admin Password

Main menu

   1) Common Configuration:
   2) zimbra-ldap:                             Enabled
   3) zimbra-logger:                           Enabled
   4) zimbra-mta:                              Enabled
   5) zimbra-dnscache:                         Enabled
   6) zimbra-snmp:                             Enabled
   7) zimbra-store:                            Enabled
        +Create Admin User:                    yes
        +Admin user to create:                 admin@mail.inguide.in
******* +Admin Password                        UNSET
        +Anti-virus quarantine user:           virus-quarantine.3liys4nw@mail.inguide.in
        +Enable automated spam training:       yes
        +Spam training user:                   spam.cfzvesa2d5@mail.inguide.in
        +Non-spam(Ham) training user:          ham.ofijq5m5@mail.inguide.in
        +SMTP host:                            mail.inguide.in
        +Web server HTTP port:                 8080
        +Web server HTTPS port:                8443
        +Web server mode:                      https
        +IMAP server port:                     7143
        +IMAP server SSL port:                 7993
        +POP server port:                      7110
        +POP server SSL port:                  7995
        +Use spell check server:               yes
        +Spell server URL:                     http://mail.inguide.in:7780/aspell.php
        +Enable version update checks:         TRUE
        +Enable version update notifications:  TRUE
        +Version update notification email:    admin@mail.inguide.in
        +Version update source email:          admin@mail.inguide.in
        +Install mailstore (service webapp):   yes
        +Install UI (zimbra,zimbraAdmin webapps): yes

   8) zimbra-spell:                            Enabled
   9) zimbra-proxy:                            Enabled
  10) Default Class of Service Configuration:
   s) Save config to file
   x) Expand menu
   q) Quit

Address unconfigured (**) items  (? - help) 7


Store configuration

   1) Status:                                  Enabled
   2) Create Admin User:                       yes
   3) Admin user to create:                    admin@mail.inguide.in
** 4) Admin Password                           UNSET
   5) Anti-virus quarantine user:              virus-quarantine.3liys4nw@mail.inguide.in
   6) Enable automated spam training:          yes
   7) Spam training user:                      spam.cfzvesa2d5@mail.inguide.in
   8) Non-spam(Ham) training user:             ham.ofijq5m5@mail.inguide.in
   9) SMTP host:                               mail.inguide.in
  10) Web server HTTP port:                    8080
  11) Web server HTTPS port:                   8443
  12) Web server mode:                         https
  13) IMAP server port:                        7143
  14) IMAP server SSL port:                    7993
  15) POP server port:                         7110
  16) POP server SSL port:                     7995
  17) Use spell check server:                  yes
  18) Spell server URL:                        http://mail.inguide.in:7780/aspell.php
  19) Enable version update checks:            TRUE
  20) Enable version update notifications:     TRUE
  21) Version update notification email:       admin@mail.inguide.in
  22) Version update source email:             admin@mail.inguide.in
  23) Install mailstore (service webapp):      yes
  24) Install UI (zimbra,zimbraAdmin webapps): yes

Select, or 'r' for previous menu [r] 4

Next, either accept the generated pass or enter the new one

Password for admin@mail.inguide.in (min 6 characters): [m3XShBkX]

Store configuration

   1) Status:                                  Enabled
   2) Create Admin User:                       yes
   3) Admin user to create:                    admin@mail.inguide.in
   4) Admin Password                           set
   5) Anti-virus quarantine user:              virus-quarantine.3liys4nw@mail.inguide.in
   6) Enable automated spam training:          yes
   7) Spam training user:                      spam.cfzvesa2d5@mail.inguide.in
   8) Non-spam(Ham) training user:             ham.ofijq5m5@mail.inguide.in
   9) SMTP host:                               mail.inguide.in
  10) Web server HTTP port:                    8080
  11) Web server HTTPS port:                   8443
  12) Web server mode:                         https
  13) IMAP server port:                        7143
  14) IMAP server SSL port:                    7993
  15) POP server port:                         7110
  16) POP server SSL port:                     7995
  17) Use spell check server:                  yes
  18) Spell server URL:                        http://mail.inguide.in:7780/aspell.php
  19) Enable version update checks:            TRUE
  20) Enable version update notifications:     TRUE
  21) Version update notification email:       admin@mail.inguide.in
  22) Version update source email:             admin@mail.inguide.in
  23) Install mailstore (service webapp):      yes
  24) Install UI (zimbra,zimbraAdmin webapps): yes

Now you will be asked a few more questions.

Select, or 'r' for previous menu [r] r

Main menu

   1) Common Configuration:
   2) zimbra-ldap:                             Enabled
   3) zimbra-logger:                           Enabled
   4) zimbra-mta:                              Enabled
   5) zimbra-dnscache:                         Enabled
   6) zimbra-snmp:                             Enabled
   7) zimbra-store:                            Enabled
   8) zimbra-spell:                            Enabled
   9) zimbra-proxy:                            Enabled
  10) Default Class of Service Configuration:
   s) Save config to file
   x) Expand menu
   q) Quit

*** CONFIGURATION COMPLETE - press 'a' to apply
Select from menu, or press 'a' to apply config (? - help) a
Save configuration data to a file? [Yes]
Save config in file: [/opt/zimbra/config.21298]
Saving config in /opt/zimbra/config.21298...done.
The system will be modified - continue? [No] yes

At the end of the installation, you will be asked whether you would like to notify Zimbra. Answer and your installation will be complete in a few more minutes.

Now, you can open access Zimbra from the browser. Go to https://mail.inguide.in:7071 and enter the user name admin and chosen password. You will receive SSL warning accept and proceed.

If you are unable to access then the firewall might be running. You need to allow the port to accept traffic.

root@mail:~# service ufw status
● ufw.service - Uncomplicated firewall
     Loaded: loaded (/lib/systemd/system/ufw.service; enabled; vendor preset: enabled)
     Active: active (exited) since Sun 2022-07-10 15:51:30 CEST; 2h 57min ago
       Docs: man:ufw(8)
   Main PID: 260 (code=exited, status=0/SUCCESS)
      Tasks: 0 (limit: 9479)
     Memory: 0B
     CGroup: /system.slice/ufw.service

Allow ports through the firewall

root@mail:~# ufw allow 25,80,110,143,443,465,587,993,995,5222,5223,9071,7071/tcp
Rules updated
Rules updated (v6)

Post Installation Configurations:

For post-installation configuration you can follow the instructions for Zimbra on CentOS installation.

SSL Installation

I already have covered the installation of SSL on Zimbra in detail. You can follow this guide.

Conclusion

It’s fairly easy to install Zimbra on Ubuntu compared to CentOS. But it will depend more on taste of developer.

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Trackbacks & Pingbacks

  1. […] Installing the Zimbra Mail server is not straightforward. It installs lots of packages so that you have some cool features. Therefore, you will need to configure your server in advance to prepare the ground for Zimbra. In this article, we will see step by step installation of Zimbra Open Source Edition on CentOS. If you are looking for a Zimbra installation guide for Ubuntu then you should follow this. […]

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