Install, Start / Stop / Restart Postfix Mail Server in Linux

You can  install postfix mail server in Linux using yum:

sudo yum -y install postfix

Postfix mail config file
   /etc/postfix/main.cf

To Start / Stop / Restart Postfix Mail Server in Linux:
  sudo service postfix start
  sudo service postfix stop
  sudo service postfix restart
 
 To cehck if postfix is tarted:
  sudo postfix status
You will get the following message it it is tarted:
 postfix/postfix-script: the Postfix mail system is running: PID: 2357