Would someone be able to give me a snippet of code as to how the requestReadReceipt request should be made in PHP4 please?
I'm still fumbling around with php and don't quite understand requestReadReceipt from the doco.
$swift = new Swift( ... );
$swift->requestReadReceipt(true);
$swift->send( ... );
All it does is sets a header or two which ask the receiving mail client to send a read receipt to the Reply-To: address or From: address. Don't rely upon it though, most mail clients will ask the recipient what they want to do, and many of them actually have an option to automatically ignore read receipt requests.