Not a hard question, however I can't connect the strings together to get it working:
I want nagios to use a secondary mailserver if my primary mailserver goes down.
The best would be if nagios just automatically determines if the primary mailserver is up, and if it would be down, use the secondary mailserver for the notifications. However I am happy enough if I could just configure nagios to use my secondary mailserver for only the notifications about my primary mailserver, so he uses my secondary mailserver if there are notifications about my primary mailserver being down.
I know I just have to create a second host and service notification, however I don't really know how to connect the second notifications with the specific exchange host or a specific hosts group.
At the moment, I just get nothing when my primary mailserver goes down.
Thanks in advance!