Mailgun PHPMailer SMTP integration

Mailgun PHPMailer SMTP integration.php

<?php
/**
 * This example shows settings to use when sending via Mailgun.
 */
//SMTP needs accurate times, and the PHP time zone MUST be set
//This should be done in your php.ini, but this is how to do it if you don't have access to that
date_default_timezone_set('Asia/Kolkata');
require 'PHPMailerAutoload.php';
//Create a new PHPMailer instance
$mail = new PHPMailer;
//Tell PHPMailer to use SMTP
$mail->isSMTP();
//Enable SMTP debugging
// 0 = off (for production use)
// 1 = client messages
// 2 = client and server messages
$mail->SMTPDebug = 0;
//Ask for HTML-friendly debug output
$mail->Debugoutput = 'html';
//Set the hostname of the mail server - MailGun "SMTP Hostname"
$mail->Host = 'smtp.mailgun.org';
// use
// $mail->Host = gethostbyname('smtp.gmail.com');
// if your network does not support SMTP over IPv6
//Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
$mail->Port = 587;
//Set the encryption system to use - ssl (deprecated) or tls
$mail->SMTPSecure = 'tls';
//Whether to use SMTP authentication
$mail->SMTPAuth = true;
//Username to use for SMTP authentication - MailGun "Default SMTP Login"
$mail->Username = "postmaster@domain_name";
//Password to use for SMTP authentication - MailGun "Default Password"
$mail->Password = "MailGun Default Password";
//Set who the message is to be sent from
$mail->setFrom('From Address', 'Sender Name');
//Set an alternative reply-to address
$mail->addReplyTo('Reply To', 'Sender Name');
//Set who the message is to be sent to
$mail->addAddress('Send To', 'Sender Name');
//Set the subject line
$mail->Subject = 'Test';
//Read an HTML message body from an external file, convert referenced images to embedded,
//convert HTML into a basic plain-text alternative body
// $mail->msgHTML(file_get_contents('contents.html'), dirname(__FILE__));
$msg  = "This is a test message body";

$mail->Body = $msg;
//Replace the plain text body with one created manually
$mail->AltBody = 'This is a plain-text message body';
//Attach an image file
// $mail->addAttachment('images/phpmailer_mini.png');
//send the message, check for errors
if (!$mail->send()) {
    header('HTTP/1.1 500 Internal Server Error', true, 500);
} else {
    header('HTTP/1.1 200 OK', true, 200);
}