Configuring email notifications

Hello everyone,
I need a kind help. I have some hosts and are kept under hosts.cfg file and the same file contains other hosts that are not related to the previous. And i need to notify by email about the status of hosts that are of different category kept under same file(hosts.cfg). I have tried but i always get the emails for every hosts that are under hosts.cfg. How to configure for the specific host under the same file?

Kindly waiting for helps ASAP…

Regards,
lawusg

nagios notifies for a problem… not if a host is in a config file…
what are you trying to do exactly?

dear Luca,
I want to notify host problems with different messages. Just like i have got 30 hosts lets say and 10/10/10 are grouped in diff category. Now i need to notify these host problem accordingly the group with different notification alerts by email.
I have put all these host in a single cfg file but the alert i have received is from all host in the same email address. i need to notify group wise alert notification in different email addresses.

How to get started?

Regards…

create different host-notify-by-email commands and assign them to the hostgroups.