#!/usr/local/bin/perl
use strict;
use warnings;
use Net::Ping;
use Net::SMTP;

my $from = 'from@email.com';
my $site = 'email.com';
my $smtp_host = 'smtp.email.com';
my $to = 'to@email.com';
my $smtp = Net::SMTP->new($smtp_host, Hello => $site);


my $oFile = open(oFILE, ">", "output.file") or die("unable to write to $!\n");

my $hFile = open(hFILE, "<", "host.file") or die("unable to open $!\n");
my @ip_array = <hFILE>;
chomp(@ip_array);

my $eFile = open(eFILE, ">", "email.file") or die("unable to write to $!\n");
my @efile = <eFILE>;
chomp(@efile);

sub email {	
	$smtp->mail($from);
	$smtp->to($to);
	$smtp->data();
	$smtp->datasend("To: $to\n");
	$smtp->datasend("Subject: Ping failure notice.\n");
	$smtp->datasend("\n");
	$smtp->datasend("Ping failed on host $_\n");
	$smtp->dataend;
	print eFILE ("$_\n");
}

my $p = Net::Ping->new();

foreach (@ip_array) {
		if($p->ping($_)) {
			print oFILE ("$_ is responding to ping.\n");
		} else {
			print oFILE ("$_ is NOT responding to ping.\n");
			unless ($_ =~ my @eFile) {
			email();
			}
		}    
        }

close(hFILE);
close(oFILE);
close(eFILE);

$p->close();
$smtp->quit;

#End of Code