PHP - AYUDA!!! error al enviar un email php

<?php

error_reporting(E_ALL);

ini_set('display_errors', '1');

require 'vendor/phpmailer/phpmailer/PHPMailerAutoload.php';

$mail = new PHPMailer; //Create a new PHPMailer instance

$body = "<h3>Registro</h3>

	<strong>Nombre:</strong>".$_POST['nombre']."<br/>

        <strong>Ciudad:</strong>".$_POST['ciudad']."<br/>

        <strong>Telefono:</strong>".$_POST['telefono']."<br/>

        <strong>Email:</strong>".$_POST['email']."<br/>

	<strong>Mensaje:</strong>".$_POST['mensaje']."<br/>

	";

$mail->isSMTP(); //Tell PHPMailer to use SMTP

$mail->SMTPDebug = 4; //Enable SMTP debugging

$mail->Debugoutput = 'html'; //Ask for HTML-friendly debug output

$mail->Host = 'smtp.gmail.com'; //Set the hostname of the mail server

$mail->Port = 587; //Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission

$mail->SMTPSecure = 'tls'; //Set the encryption system to use - ssl (deprecated) or tls

$mail->SMTPAuth = true; //Whether to use SMTP authentication

$mail->Username = "mail@gmail.com"; //Username to use for SMTP authentication - use full email address for gmail

$mail->Password = "123456789"; //Password to use for SMTP authentication

$mail->setFrom('mail@gmail.com', 'First Last'); //Set who the message is to be sent from

$mail->addReplyTo('mail@gmail.com', 'First Last'); //Set an alternative reply-to address

$mail->addAddress('mail@gmail.com', 'John Doe'); //Set who the message is to be sent to

$mail->Subject = 'Mensaje Usuario Micovinoc landing'; //Set the subject line

$mail->msgHTML($body); //convert HTML into a basic plain-text alternative body

$mail->AltBody = 'Mensaje Usuario Micovinoc landing'; //Replace the plain text body with one created manually

if (!$mail->send()) { //send the message, check for errors

    echo "Error al enviar email: " . $mail->ErrorInfo;

} else {

    return json_encode(array('state' => 1));

}

?>