8.7 KiB
Install iRedMail on Red Hat Enterprise Linux, CentOS
[TOC]
!!! attention
It's recommended to use the new __iRedMail Easy__ deployment and support
platform to deploy and keep your mail server up to date, technical support
is available through the ticket system.
Read more: [iRedMail Easy - Meet our new deployment and support platform](./iredmail-easy.getting.start.html)
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 although it will backup files before
modifying, and it may not be working as expected.
* Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
server with AWS, you need to [remove the throttle on port
25](https://aws.amazon.com/premiumsupport/knowledge-center/ec2-port-25-throttle/).
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
2 GB
memory is required for a low traffic production mail server, but4 GB
is strongly recommended to prevent ClamAV eating too much memory for big virus signature database. - Make sure 3 UID/GID are not used by other user/group: 2000, 2001, 2002.
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:
-
/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
-
On CentOS:
- Enable official yum repositories. On CentOS 8, please make sure repo
AppStream
andPowerTools
are enabled. - Enable repo
epel
. - DISABLE all other third-party yum repositories to avoid package conflict.
- Enable official yum repositories. On CentOS 8, please make sure repo
-
On Red Hat Enterprise Linux:
- Enable Red Hat Network to install packages, or create a local yum repository with DVD/CD ISO images.
- Enable
epel
repo (you can enable it by installing packageepel-release
)
!!! attention
Since official RHEL/CentOS and EPEL repositories don't have all
required packages with the needed features, iRedMail team has built these
packages and made them available trough the iRedMail repository enabled by
default at installation time. You can view all available packages
[here](https://dl.iredmail.org/yum/rpms/), please check `README` and
`ChangeLog` files under each directory for more details. Source RPMs (srpm)
used by iRedMail team to build the binary packages are available
[here](https://dl.iredmail.org/yum/srpms/).
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.gz
(replace x.y.z by the real version number). -
Uncompress iRedMail tarball:
# cd /root/
# tar zxf iRedMail-x.y.z.tar.gz
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
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.
!!! note "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.
Important things you MUST know after installation
!!! warning
The weakest part of a mail server is user's weak password. Spammers don't
want to hack your server, they just want to send spam from your server.
Please __ALWAYS ALWAYS ALWAYS__ force users to use a strong password.
-
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. You can also check this tutorial instead: Locations of configuration and log files of major components.
- Some other important and sensitive information
-
Locations of configuration and log files of major components
-
It's highly recommended to get a SSL cert to avoid annonying warning message in web browser or mail clients when accessing mailbox via HTTPS/IMAPS/POP3/SMTPS. Let's Encrypt offers FREE SSL certificate. We have a document for you to use a SSL certificate.
-
If you need to bulk create mail users, check our document for OpenLDAP and MySQL/MariaDB/PostgreSQL.
-
If you're running a busy mail server, we have some suggestions for better performance.
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.
- Roundcube webmail: https://your_server/mail/
- SOGo Groupware: https://your_server/SOGo
- Web admin panel (iRedAdmin): httpS://your_server/iredadmin/
- Awstats: httpS://your_server/awstats/awstats.pl?config=web (or
?config=smtp
for SMTP traffic log)
Get technical support
- You are welcome to post issues, feedbacks, feature requests, suggestions in our online support forum, it's more responsive than you expected.
- We offer paid professional support service too, check our web site for more details: Get Professional Support from iRedMail Team.