I am a beginner for Ubuntu Server and have very little knowledge about it.
We have a running instance of Nagios Core from a production server TEST-1 (Ubuntu 14.04.2). It was set up before i joined the organization so i am unaware of existing MTA configuration. We are properly receiving email notifications from this server.
Now i am trying to set up a 2nd instance of Nagios Core on a different production server TEST-2 (Ubuntu 14.04.2). I am facing issues setting up MTA.
I want to check the existing configuration of MTA on TEST-1 so i can apply the same on TEST-2. Can anyone please help me to check it step-by-step?