my $mailer = new Mail::Mailer 'smtp', Server => 'localhost' or die "Couldn't create a mail object!\n";

my $mail_headers =  {
    'Content-Type' => 'text/plain', #I tried with 'text/html' for html body. But that one was also failed :(
    To => [ $to ],
    From => 'root@mydomain.com',
    Subject => $subject,
};
$mailer->open( $mail_headers );

$mailer->print($mailContents); #$mailContents - Contains the file contents with new lines.

$mailer->close();