33.8 Starting Postfix on an Ubuntu System

Once the /etc/postfix/main.cf file is configured with the correct settings it is now time to start up postfix. This can be achieved from the command-line as follows:

# systemctl start postfix

If postfix was already running, make sure the configuration changes are loaded using the following command:

# systemctl reload postfix

To configure postfix to start automatically at system startup, run the following command:

# systemctl enable postfix

The postfix process should now start up. The best way to verify that everything is working is to check your mail log. This is typically in the /var/log/mail.log file and should now contain an entry resembling the following output:

Mar 25 11:21:48 demo-server postfix/postfix-script[5377]: starting the Postfix mail system

Mar 25 11:21:48 demo-server postfix/master[5379]: daemon started -- version 3.3.1, configuration /etc/postfix

As long as no error messages have been logged,...