Very Easy & Effective Tool

Worked perfectly. Just download it & make following changes in Nagios configuration.

In /usr/local/nagios/etc/objects/commands.cfg

define command {
command_name check_abc.com
command_line $USER1$/check_domain -d $ARG1$ -w $ARG2$ -c $ARG3$
}
####################################
In /usr/local/nagios/etc/objects/localhost.cfg

define service{
use generic-service ; Inherit values from a template
host_name localhost
service_description Domain Expiry of abc.com

check_command check_abc.com!abc.com!30!10

Here, 30 = Warning of 30 days remaining
10 = Critical message of 10 days remaining

Nishith N.Vyas