This blog assumes that NRPE and nagios plugins are already installed on the remote server. Remote OS: Centos 6.7Nagios Server OS: Centos 5.7WHM: 11.50.0NRPE: 2.14   Remote server Download the check_eximailqueue plugin (version 1.3 as of writing) from Nagios.org . Upload the plugin to the the Nagios plugin directory (/usr/lib64/nagios/plugins/) on the remote server [RemoteServer]# vi /usr/lib64/nagios/plugins/check_eximailqueue Uncomment the following Read More…