Hi There,
First of all, PHPMailer (sendmail.php) will not work until you upload it on an online hosting server.
Moreover, some hosting servers do not support PHPMailer (sendmail.php). Then, you need to contact with your hosting provider.
Please Note: PHPMailer is a 3rd party script. If your hosting server is not supporting this anyway, then there is nothing in our hands to support.
Best Regards,
ThemeLooks Support Team