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iredmail-doc/installation/0-install.iredmail.on.rhel.md

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Install iRedMail on Red Hat Enterprise Linux, CentOS

[TOC]

System Requirements

WARNING: iRedMail is designed to be deployed on a FRESH server system, which means your server does NOT have mail related components installed, e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install and configure them for you automatically. Otherwise it may override your existing files/configurations althought it will backup files before modifing, and it may be not working as expected.

To install iRedMail on RHEL or CentOS Linux, you need:

  • A FRESH, working RHEL or CentOS system. Supported releases are listed on Download page.
  • At least 1 GB of memory is required for low traffic production server. Spam/Virus scanning will take most system resource.

Preparations

Set a fully qualified domain name (FQDN) hostname on your server

No matter your server is a testing machine or production server, it's strongly recommended to set a fully qualified domain name (FQDN) hostname.

Enter command hostname -f to view the current hostname:

$ hostname -f
mx.example.com

On RHEL/CentOS/Scientific Linux, hostname is set in two files:

  • For RHEL/CentOS/Scientific Linux 6, hostname is defined in /etc/sysconfig/network.
HOSTNAME=mx.example.com

For RHEL/CentOS/Scientific Linux 7, hostname is defined in /etc/hostname.

mx.example.com
  • /etc/hosts: hostname <=> IP address mapping. Warning: List the FQDN hostname as first item.
127.0.0.1   mx.example.com mx localhost localhost.localdomain

Verify the FQDN hostname. If it wasn't changed, please reboot server to make it work.

$ hostname -f
mx.example.com

Disable SELinux.

iRedMail doesn't work with SELinux, so please disable it by setting below value in its config file /etc/selinux/config.

SELINUX=disabled

Now disable it immediately without rebooting your server.

# setenforce 0

Enable yum repositories for installing new packages

  • For CentOS or Scientific Linux, please enable CentOS/Scientific official yum repositories, and DISABLE all third-party yum repositories to avoid package conflict.

  • For Red Hat Enterprise Linux, please enable Red Hat Network to install packages, or create a local yum repository with DVD/CD ISO images.

Download the latest release of iRedMail

  • Visit Download page to get the latest stable release of iRedMail.

  • Upload iRedMail to your mail server via ftp or scp or whatever method you can use, login to the server to install iRedMail. We assume you uploaded it to /root/iRedMail-x.y.z.tar.bz2 (replace x.y.z by the real version number).

  • Uncompress iRedMail tarball:

# cd /root/
# tar xjf iRedMail-x.y.z.tar.bz2

Start iRedMail installer

For Chinese users: Our domain name "iredmail.org" is blocked in China mainland since Jun 04, 2011, please replace all 'iredmail.org' by its IP address "106.187.51.47" (without quotes) in /root/iRedMail-x.y.z/pkgs/get_all.sh BEFORE executing "iRedMail.sh". This is a Linode VPS hosted in Tokyo, Japan.

It's now ready to start iRedMail installer, it will ask you several simple questions, that's all steps to setup a full-featured mail server.

# cd /root/iRedMail-x.y.z/
# bash iRedMail.sh

Screenshots of installation:

  • Welcome and thanks for your use

  • Specify location to store all mailboxes. Default is /var/vmail/.

  • Choose backend used to store mail accounts. You can manage mail accounts with iRedAdmin, our web-based iRedMail admin panel.

IMPORTANT NOTE: There's no big difference between available backends, so it's strongly recommended to choose the one you're familiar with for easier management and maintenance after installation.

  • If you choose to store mail accounts in OpenLDAP, iRedMail installer will ask you two questions about OpenLDAP.

    • LDAP suffix.

* Password of LDAP root dn.

  • Set password of MySQL or PostgreSQL admin user.

NOTE: MySQL is used to store data of other applications (e.g. Roundcube webmail, Cluebringer, Amavisd-new) if you choose OpenLDAP or MySQL as backend.

  • Add your first mail domain name

  • Set password of admin account of your first mail domain.

Note: This account is an admin account and a mail user. That means you can login to webmail and admin panel (iRedAdmin) with this account, login username is full email address.

  • Choose optional components

After answered above questions, iRedMail installer will ask your confirm to start installation. It will install and configure required packages automatically. Type y or Y and press Enter to start.

Configuration completed.

*************************************************************************
**************************** WARNING ***********************************
*************************************************************************
*                                                                       *
* Please do remember to *REMOVE* configuration file after installation  *
* completed successfully.                                               *
*                                                                       *
*   * /root/iRedMail-x.y.z/config
*                                                                       *
*************************************************************************
<<< iRedMail >>> Continue? [Y|n]        # <- Type 'Y' or 'y' here, and press 'Enter' to continue

Important things you MUST know after installation

  • Read file /root/iRedMail-x.y.z/iRedMail.tips first, it contains:

    • URLs, usernames and passwords of web-based applications
    • Location of mail serve related software configuration files
    • Some other important and sensitive information

  • Setup DNS records for your mail server

Access webmail and other web applications

After installation successfully completed, you can access web-based programs if you choose to install them. Replace your_server below by your real server hostname or IP address.

Get technical support

Please post all issues, feedbacks, feature requests, suggestions in our online support forum, it's more responsible than you expected.