Email and Calendars with Zimbra 6 on Debian 5 (Lenny)
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Zimbra is a groupware system that provides email, calendaring, integrated antivirus and spam filtering, and more for multiple domains. Available in several editions, this guide will help you get the Open Source Edition installed on your Debian 5 (Lenny) Linode.
Please note that Zimbra is a fairly “heavy” (resource-intensive) product compared to some other groupware offerings. We recommend a Linode 2048 or higher for best results; you may encounter issues using Zimbra with lower-resource plans. Additionally, note that Zimbra works best as a standalone product on your Linode; installation alongside other common software such as web or email servers is not advised.
We assume you’ve already followed the steps outlined in our Setting Up and Securing a Compute Instance, and that your system is up to date. All configuration will be performed through the terminal; please make sure you’re logged into your Linode as root via SSH.
Installing Prerequisite Packages
Make sure your package repositories and installed programs are up to date by issuing the following commands:
apt-get update apt-get upgrade --show-upgraded
Issue the following commands to install several packages required by Zimbra:
apt-get install sudo libpcre3 libgmp3c2 libgmp3-dev sysstat libexpat1 libidn11 perl-modules wget
Depending on the requirements for the current version of Zimbra, you may need to install additional packages later. The install program will notify you if there additional packages are required.
System Files Prerequisites
Before proceeding, make sure your
/etc/hosts file has valid entries. For reference, your file should resemble the following:
- File: /etc/hosts
127.0.0.1 localhost.localdomain localhost 18.104.22.168 hostname.example.com hostname
Be sure to replace “22.214.171.124” with your Linode’s IP address. Replace “hostname.example.com” with your Linode’s fully qualified domain name. Next, make sure your hostname is set in
/etc/hostname by issuing the following commands (insert your one-word hostname in place of “hostname”).
echo "hostname" > /etc/hostname hostname -F /etc/hostname
Issue the following commands to check your setup:
hostname hostname -f
The first command should return only the one-word hostname for your system, while the second command should return the system’s FQDN.
Visit the download page for Zimbra Open Source Edition and copy the link to the current version of the software for Debian 5 (Lenny) to your clipboard. Issue the following commands on your Linode via the shell to download and unpack the install package, replacing the filenames shown below after
tar with the current version. Please note that the version you download (32 or 64-bit) must match your Linode’s architecture.
wget http://files2.zimbra.com/downloads/6.0.7_GA/zcs-6.0.7_GA_2473.DEBIAN5.20100616212143.tgz tar -xzvf zcs* cd zcs*
Launch the installer with the following command:
The install will begin, prompting you to respond to a number of questions, and consuming a moment to perform various tasks. You can safely assume the default configuration. The system will offer the following prompt:
The system will be modified. Continue? [N] Y
As noted, answer
Y to continue with the installation. The installation will take a few moments to install of the system packages.
After the installation completes, you may receive a warning similar to the one shown below:
DNS ERROR resolving MX for hostname.example.com It is suggested that the domain name have an MX record configured in DNS Change domain name? [Yes] No
It is recommended (but not required) that the fully qualified domain name for your system (
hostname.example.com) have an MX record pointing to it. You may wish to visit your DNS control panel and add such a record now, or proceed if you won’t be receiving mail for your FQDN on this system (for example, if you’ll be receiving email for your base domain or others).
You’ll then be presented with an admin menu next.
Main menu 1) Common Configuration: 2) zimbra-ldap: Enabled 3) zimbra-store: Enabled +Create Admin User: yes +Admin user to create: email@example.com ******* +Admin Password UNSET +Enable automated spam training: yes +Spam training user: firstname.lastname@example.org +Non-spam(Ham) training user: email@example.com +Global Documents Account: firstname.lastname@example.org +SMTP host: hostname.example.com +Web server HTTP port: 80 +Web server HTTPS port: 443 +Web server mode: http +IMAP server port: 143 +IMAP server SSL port: 993 +POP server port: 110 +POP server SSL port: 995 +Use spell check server: yes +Spell server URL: http://hostname.example.com:7780/aspell.php +Configure for use with mail proxy: FALSE +Configure for use with web proxy: FALSE +Enable version update checks: TRUE +Enable version update notifications: TRUE +Version update notification email: email@example.com +Version update source email: firstname.lastname@example.org 4) zimbra-mta: Enabled 5) zimbra-snmp: Enabled 6) zimbra-logger: Enabled 7) zimbra-spell: Enabled 8) Default Class of Service Configuration: r) Start servers after configuration yes s) Save config to file x) Expand menu q) Quit Address unconfigured (**) items (? - help)
Enter “3” to enter the zimbra-store menu, which will look similar to the following:
Store configuration 1) Status: Enabled 2) Create Admin User: yes 3) Admin user to create: email@example.com ** 4) Admin Password UNSET 5) Enable automated spam training: yes 6) Spam training user: firstname.lastname@example.org 7) Non-spam(Ham) training user: email@example.com 8) Global Documents Account: firstname.lastname@example.org 9) SMTP host: hostname.example.com 10) Web server HTTP port: 80 11) Web server HTTPS port: 443 12) Web server mode: http 13) IMAP server port: 143 14) IMAP server SSL port: 993 15) POP server port: 110 16) POP server SSL port: 995 17) Use spell check server: yes 18) Spell server URL: http://hostname.example.com:7780/aspell.php 19) Configure for use with mail proxy: FALSE 20) Configure for use with web proxy: FALSE 21) Enable version update checks: TRUE 22) Enable version update notifications: TRUE 23) Version update notification email: email@example.com 24) Version update source email: firstname.lastname@example.org Select, or 'r' for previous menu [r] 4
You can configure various options here; but, the most important option is the one for setting the administrator password. Enter “4” to set it, choosing a strong password comprised of letters, numbers, and non-alphanumeric characters. After setting the admin password, enter “r” to return to the main menu. At this point you can enter “a” to apply the configuration that you have set, and follow this procedure. This allows Zimbra to proceed with the remaining installation steps.
After installation has completed, you may wish to reboot your Linode to make sure everything comes back up properly. After doing so, visit the Zimbra admin URL in your browser. It will be in the form
https://hostname.example.com:7071/. You’ll need to accept the SSL certificate presented to access the admin panel, which you may then use to continue configuring your new Zimbra server.
Once you have configured the server and added accounts, users may log in using a link similar to
Monitor for Software Updates and Security Notices
When running software compiled or installed directly from sources provided by upstream developers, you are responsible for monitoring updates, bug fixes, and security issues. After becoming aware of releases and potential issues, update your software to resolve flaws and prevent possible system compromise. Monitoring releases and maintaining up to date versions of all software is crucial for the security and integrity of a system.
Please monitor the Zimbra Updates page to ensure that you are aware of all updates to the software and can upgrade appropriately or apply patches and recompile as needed.
When upstream sources offer new releases, repeat the instructions for installing Zimbra and recompile your software when needed. These practices are crucial for the ongoing security and functioning of your system.
You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.
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