In today's digital world, email management is a crucial aspect of any organization. Postfix, a popular open-source MTA (Mail Transfer Agent), offers powerful capabilities for email management, including forwarding emails through user aliases. In this article, you'll learn how to create and manage user aliases in Postfix on CentOS 7 for efficient email forwarding.

Prerequisites

Before getting started, make sure that:

• You have full access to a CentOS 7 server.
• Postfix is installed and properly configured on your system.
• You have access to a user with sudo privileges to make changes and restart services.

Step 1: Install and Configure Postfix

If you haven't installed Postfix yet, you can install it using the following command:

sudo yum install postfix
sudo systemctl start postfix
sudo systemctl enable postfix

Ensure that Postfix is running and set as the default MTA:

sudo alternatives --set mta /usr/sbin/sendmail.postfix

Step 2: Create Aliases

User aliases in Postfix are defined in the /etc/aliases file. This file allows you to define where emails should be forwarded. To edit the file, use your preferred text editor:

sudo nano /etc/aliases

Adding an alias is straightforward. Append a line to the end of the file in the format:

newalias: This email address is being protected from spambots. You need JavaScript enabled to view it.

For example, to forward all mail for the user info to This email address is being protected from spambots. You need JavaScript enabled to view it., add:

info: This email address is being protected from spambots. You need JavaScript enabled to view it.

After adding all necessary aliases, save the file and close the editor.

Step 3: Apply Changes

To make Postfix start using the new aliases, process the aliases file with the command:

sudo newaliases

Then, restart Postfix to apply the changes:

sudo systemctl restart postfix

Step 4: Test Aliases

After restarting Postfix, it's a good idea to test whether forwarding is working correctly. You can do this by sending a test email to the alias address:

echo "Test email" | mail -s "Alias Test" This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Creating user aliases in Postfix on CentOS 7 is an easy and efficient way to manage email communications. This method allows you to easily forward emails to other addresses, which is useful for managing generic email accounts like info@yourdomain. With proper care and regular maintenance, Postfix can serve as a robust and reliable tool for managing your emails.