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. After server reboot, SELinux will be completely disabled.
SELINUX=disabled
If you prefer to let SELinux prints warnings instead of enforcing, you can set below value instead:
SELINUX=permissive
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.
  • Uncompress iRedMail tarball:
  • # cd /root/
    # tar xjf iRedMail-x.y.z.tar.bz2
    

    Start iRedMail installer

    It's now ready to start iRedMail installer, it will ask you several simple questions, that's all required to setup a full-featured mail server.
    # cd /root/iRedMail-x.y.z/
    # bash iRedMail.sh
    
    Note to Chinese Users
    Our domain name iredmail.org has been blocked in mainland China for years (since Jun 04, 2011), please run command below to finish the installation:
    IREDMAIL_MIRROR='http://42.159.241.31' bash iRedMail.sh
    Additional variables are:
    • EPEL repo: IREDMAIL_EPEL_MIRROR='http://mirrors.aliyun.com/epel'
    • SOGo repo: SOGO_PKG_MIRROR='http://42.159.241.31/SOGo'

    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.
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 to set the LDAP suffix.

To MySQL/MariaDB/PostgreSQL users
If you choose to store mail accounts in MySQL/MariaDB/PostgreSQL, iRedMail installer will generate a random, strong password for you. You can find it in file iRedMail.tips.
  • 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 you to review and confirm to start installation. It will install and configure required packages automatically. Type y or Y and press Enter to start.


Read file /root/iRedMail-x.y.z/iRedMail.tips first, it contains:
  • URLs, usernames and passwords of web-based applications
  • Location of mail service related software configuration files

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.

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