How To Install and Configure Postfix on CentOS Stream 9

To install and configure Postfix on CentOS Stream 9, follow the steps below.

Step 1 : Start by updating your system to ensure you have the latest packages.

sudo dnf update

Step 2 : Install the Postfix mail server using the following command.

sudo dnf install postfix

Step 3 : Start the Postfix service and enable it to start on boot.

sudo systemctl start postfix
sudo systemctl enable postfix

Step 4 : Check the status of Postfix to ensure it's running without errors.

sudo systemctl status postfix

Step 5 : Test Postfix

- Install the s-mail package to send test emails.

sudo dnf install s-nail

- Visit a temporary mail service page, e.g., temp-mail.org.

- Send a test email to the temporary email address.

echo "This is a test email" | mail -s "Test email subject" your_temporary_mail

- Check received mail on the temporary mail page.

Step 6 : Verify mail logs for any potential issues.

sudo journalctl -xe | grep postfix

Congratulations! You have successfully installed and configured Postfix on CentOS Stream 9.