PHP Extension

Request a Return Receipt for an Email

Demonstrates the Chilkat Email.ReturnReceipt property. Set it to true to request a return-receipt when the message is received; this causes a Disposition-Notification-To header to be added when the email is sent. The default is false. This example enables the request.

Background: A return receipt (technically a Message Disposition Notification, MDN) asks the recipient's mail client to send back a small confirmation when the message is opened. It is only a request: the receiving client or server is free to ignore it, and many prompt the user before sending anything. Because of this, a return receipt is not reliable proof that a human actually read the message — treat it as a courtesy signal, not a guarantee.

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PHP Extension

<?php

include("chilkat.php");

//  Demonstrates the Email.ReturnReceipt property.  Set to true to request a
//  return-receipt when the email is received.  This causes a Disposition-Notification-To
//  header to be added when the email is sent.  The default is false.

$email = new CkEmail();
$email->put_Subject('Please confirm receipt');
$email->put_Body('Kindly confirm you received this message.');
$email->put_From('alice@example.com');
$email->AddTo('Bob','bob@example.com');

//  Request a return receipt.
$email->put_ReturnReceipt(true);

print 'ReturnReceipt = ' . $email->get_ReturnReceipt() . "\n";

?>