PHP
Chilkat2 PHP
Request a Return Receipt for an Email
See more Email Object Examples
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
use Chilkat2\Email;
// 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 Email();
$email->Subject = 'Please confirm receipt';
$email->Body = 'Kindly confirm you received this message.';
$email->From = 'alice@example.com';
$email->AddTo('Bob', 'bob@example.com');
// Request a return receipt.
$email->ReturnReceipt = true;
echo 'ReturnReceipt = ', ($email->ReturnReceipt ? 'true' : 'false'), "\n";