How To Install and Configure Postfix on AlmaLinux 9

To install and configure Postfix on AlmaLinux 9, follow these steps:

Step 1 : Update System Packages

Before installing Postfix, update your system packages to ensure you have the latest versions:

sudo dnf update -y

Step 2 : Install Postfix

Install Postfix using the following command:

sudo dnf install postfix -y

Step 3 : Start and Enable Postfix

Once installed, start the Postfix service and enable it to run at boot:

sudo systemctl enable postfix --now

Step 4 : Verify Postfix Status

Check whether Postfix is running correctly:

sudo systemctl status postfix

If the service is active and running, Postfix has been successfully started.

Step 5 : Test Postfix

- To send test emails, install the s-nail package:

sudo dnf install s-nail

- Visit a temporary email service like temp-mail.org and copy the provided email address.

- Use the following command to send an email to the temporary email address:

echo "This is a test email from Postfix on AlmaLinux 9." | mail -s "Postfix Test" your-temp-email

- Go back to the temporary email service and check if the email has arrived. If received, Postfix is successfully sending emails.

Step 6 : Check Mail Logs

To troubleshoot any issues or confirm email delivery, check the Postfix logs:

sudo journalctl -xe | grep postfix

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