How to install PostfixAdmin on AlmaLinux

Here’s a step-by-step guide on how to install PostfixAdmin on AlmaLinux:

Step 1: Install MariaDB Database Server

PostfixAdmin requires a database to store its data. We’ll use MariaDB, which is a drop-in replacement for MySQL.

sudo dnf install mariadb-server mariadb -y
sudo systemctl start mariadb
sudo systemctl enable mariadb
sudo systemctl status mariadb

Step 2: Create a Database and User for PostfixAdmin

sudo mysql -u root -p
CREATE DATABASE postfixadmin;
CREATE USER 'postfixadmin'@'localhost' IDENTIFIED BY 'your_password';
GRANT ALL PRIVILEGES ON postfixadmin.* TO 'postfixadmin'@'localhost';
FLUSH PRIVILEGES;
EXIT;

Step 3: Download and Install PostfixAdmin

Download the latest version of PostfixAdmin from its official website and extract it to your web server directory.

cd /var/www/html
wget https://github.com/postfixadmin/postfixadmin/releases/download/v3.3.15/postfixadmin-3.3.15.tgz
tar -xzf postfixadmin-3.3.15.tgz
mv postfixadmin-3.3.15 postfixadmin

Step 4: Configure PostfixAdmin

Copy the configuration file and edit it to set up the database connection.

cd /var/www/html/postfixadmin
cp config.inc.php.sample config.inc.php
nano config.inc.php

Edit the following lines in config.inc.php:

$conf['default_charset'] = 'UTF-8';
$conf['db_type'] = 'mysql';
$conf['db_host'] = 'localhost';
$conf['db_user'] = 'postfixadmin';
$conf['db_pass'] = 'your_password';
$conf['db_name'] = 'postfixadmin';

Step 5: Set Up Permissions

Set the correct permissions for the PostfixAdmin directory and files.

sudo chown -R apache:apache /var/www/html/postfixadmin
sudo chmod -R 755 /var/www/html/postfixadmin

Step 6: Configure Web Server

If you’re using Apache, create a virtual host configuration for PostfixAdmin.

sudo nano /etc/httpd/conf.d/postfixadmin.conf

Add the following configuration:

<VirtualHost *:80>
    ServerAdmin admin@your_domain.com
    DocumentRoot /var/www/html/postfixadmin
    ServerName mail.your_domain.com
    ErrorLog logs/postfixadmin-error_log
    CustomLog logs/postfixadmin-access_log common
</VirtualHost>

Restart Apache to apply the changes:

sudo systemctl restart httpd

Step 7: Access PostfixAdmin

Open your web browser and navigate to http://mail.your_domain.com – assuming mail.your_domain.com was already configured in DNS and has SSL certificates. Follow the setup wizard to complete the installation. You can find more help here