[Nagiosplug-help] check_http - question

[Rajini]

Hi

I want to use check_http to go after a service that would return SUCCESS or 
error messages.

I use 

/check_http -H $HOSTADDRESS$ -u $ARG1$ -R $ARG2$ -w $ARG3$ -c $ARG4$

$ARG2=SUCCESS

In case of failures, I want the entire output of error messages to be a part 
of the notification email.

How do I go about doing this. Any ideas? 

Thanks
Rajini