$mail = new PHPMailer;
   // $mail->isSMTP();                           
    $mail->Host = _s("mail.datahost.cz");
    $mail->SMTPOptions = array(
        'ssl' => array(
            'verify_peer' => false,
            'verify_peer_name' => false,
            'allow_self_signed' => true
        )
    );

    $mail->SMTPAuth = true;
    $mail->Username = _s("email@vasedomena.cz");
    $mail->Password = _s("heslokemailu");
    $mail->SMTPSecure = 'TLS';
    $mail->Port = 587;