การตั้งค่า PHPMailer ของ gmail เกิดปัญหา Warning: stream_socket_enable_crypto(): SSL operation failed with code 1

<?php
date_default_timezone_set('Asia/Bangkok');

require '../app/email/PHPMailer_v5.0.2/class.phpmailer.php';

$mail                       = new PHPMailer();
$mail->IsSMTP(); // telling the class to use SMTP
$mail->Host                 = "smtp.gmail.com";
$mail->SMTPDebug            = 2; // enables SMTP debug information (for testing)

$mail->CharSet = "utf-8";

$mail->Port = 587;
//$mail->Port = 465;

//$mail->SMTPSecure = "ssl";
$mail->SMTPSecure = 'tls';  
$mail->SMTPAuth = true;

$mail->Username = "[email protected]";
$mail->Password = "xxx";


$mail->setFrom('[email protected]','vvv');
$mail->addAddress('[email protected]','ccc');
$mail->Subject = "Test mail From xxx";
$mail->MsgHTML("xxxxxxxxxx");

if(!$mail->send()){
    echo '<br/>';
    echo '<br/> Message could not be sent. ';
    echo '<br/> <b>Mailer Error</b> : ' . $mail->ErrorInfo;
}else{
    echo "<br/> success mail sender";
}
?>