To install a barebones, default installation of an email server using Postfix is pretty simple. There are, of course, many other setting that should be configured in order to secure the server. This is just to get it up and running and sending mail.
sudo yum install postfix
That’s about it for the installation, not too bad eh?
Now to start the service
[david@makewhatis~]$ sudo /etc/init.d/postfix start
lets test the mail server:
[david@makewhatis~]$ mail email@example.com Subject: This is a TEST I pressed enter and now this is the body. Now I will press enter and end the body with a period on the next line . Cc:
And that’s it!
For more detailed instructions on a mail server setup you can refer to