PHPmailer not sending messages to gmail - php

Question

I am trying to send messages from my website specialeducationnotes.co.in but not able to send the messages.
<?php
if(isset($_POST['query-submit'])) {
require 'phpmailer/PHPMailerAutoload.php';
$mail = new PHPMailer(true);
// $mail->SMTPDebug = 4; // Enable verbose debug output
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = 'smtp.gmail.com'; // Specify main and backup SMTP servers
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'myemail#gmail.com'; // SMTP username
$mail->Password = 'secret'; // SMTP password
$mail->SMTPSecure = 'tls'; // Enable TLS encryption, `ssl` also accepted
$mail->Port = 587; // TCP port to connect to
$from = $_POST['email'];
$subject = $_POST['subject'];
$mail->From = $from;
$mail->FromName = $_POST['name'];
$mail->addAddress('specialeducationnotes1#gmail.com'); // Add a recipient
$mail->isHTML(true); // Set email format to HTML
$mail->Subject = $subject;
$mail->Body = '<h2 style="text-align: center;"s>Name: '.$_POST['name'].'<br>Email: '.$_POST['email'].'<br>Message: '.$_POST['query'].'</h2>';
$mail->AltBody = 'Hello! Hola! Namaste!';
if(!$mail->send()) {
//echo 'Message could not be sent.';
echo "<script>alert(' Your message could not be sent!');</script>";
echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
//echo 'Message has been sent';
echo "<script>alert(' Your message is sent!');</script>";
echo "<script>document.location.href='index.php'</script>";
}
}
?>
I just get a blank page with no error message or any text and email is also not sent. Can you tell what's wrong with my code?