Postfix is a powerful and flexible mail server that can be customized to suit your needs. One aspect of Postfix that you can customize is the bounce message that is sent when an email cannot be delivered. In this guide, we will walk you through the steps to configure custom bounce messages in Postfix. Whether you are using a local server or a Windows VPS UK, this tutorial covers all the necessary steps.
Step 1: Install Postfix
If you haven't installed Postfix yet, you can do so by running the following command:
sudo apt update
sudo apt install postfixDuring the installation, you will be prompted to select the type of mail server. Choose Internet Site and set your system's mail name.
Step 2: Backup the Default Configuration
Before making changes, it's a good idea to back up the default Postfix configuration file:
sudo cp /etc/postfix/main.cf /etc/postfix/main.cf.bakStep 3: Configure Custom Bounce Messages
Open the Postfix main configuration file for editing:
sudo nano /etc/postfix/main.cfAdd or modify the following lines to customize the bounce message:
bounce_template_file = /etc/postfix/bounce.cf
This line specifies the location of the bounce message template file. Next, create the bounce message template:
sudo nano /etc/postfix/bounce.cfAdd your custom bounce message. Here’s an example:
bounce_message = "We’re sorry, but your message could not be delivered. Please check the recipient address and try again."
Step 4: Reload Postfix
After configuring the bounce messages, you need to reload Postfix to apply the changes:
sudo systemctl reload postfixStep 5: Test Your Configuration
To test your configuration, send an email to a non-existent address on your domain. Check the mail log to see if your custom bounce message is sent:
tail -f /var/log/mail.logYou should see your custom bounce message in the logs if everything is configured correctly.
