Installing and Configuring Postfix on Red Hat Enterprise Linux

This section outlines the steps to install and configure Postfix on the Red Hat Enterprise Linux systems.

1. To find if the software is installed on the server already, use the following command and check on RPM-based distros:

   $ rpm-qa|grep postfix

2. If RPM is not installed, install the Postfix RPM with the following (on yum -based distros):

   $ yum install-y postfix

3. After Postfix is installed, run the following to start the service and enable it to make sure it starts after reboot:

   # systemctl start postfix

   # systemctl enable postfix

4. For more information on configuring and testing Postfix, see https://www.redhat.com/en/blog/install-configure-postfix.