How to authenticated Mail (DKIM Authentication) for gmail using PHP Mailer

How to authenticated Mail (DKIM Authentication) for gmail using PHP Mailer

DKIM still relies on the recipient server to check the validity of a message. The receiving server, if it is DKIM enabled, will check the message headers for the message signature and verify it against the Public Key published in the DKIM DNS record. If the message fails, it is up to the recipient server to classify the message accordingly.

Source code

Create  DKMI.php

<?php

/**

 * This example shows how to use DKIM message authentication with PHPMailer.

 * There's more to using DKIM than just this code - check out this article:

 * @link https://yomotherboard.com/how-to-setup-email-server-dkim-keys/

 * See also the DKIM code in the PHPMailer unit tests,

 * which shows how to make a key pair from PHP.

 */

 

require '../PHPMailerAutoload.php';

 

//Create a new PHPMailer instance

$mail = new PHPMailer;

//Set who the message is to be sent from

$mail->setFrom('from@example.com', 'First Last');

//Set an alternative reply-to address

$mail->addReplyTo('replyto@example.com', 'First Last');

//Set who the message is to be sent to

$mail->addAddress('whoto@example.com', 'John Doe');

//Set the subject line

$mail->Subject = 'PHPMailer DKIM test';

//This should be the same as the domain of your From address

$mail->DKIM_domain = 'example.com';

//Path to your private key file

$mail->DKIM_private = 'dkim_private.pem';

//Set this to your own selector

$mail->DKIM_selector = 'phpmailer';

//If your private key has a passphrase, set it here

$mail->DKIM_passphrase = '';

//The identity you're signing as - usually your From address

$mail->DKIM_identity = $mail->From;

 

//send the message, check for errors

if (!$mail->send()) {

echo "Mailer Error: " . $mail->ErrorInfo;

} else {

echo "Message sent!";

}                                                                                                                                                                                                             

For more clarity click here