Delphi DLL

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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Delphi DLL

var
email: HCkEmail;

begin
//  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 := CkEmail_Create();
CkEmail_putSubject(email,'Please confirm receipt');
CkEmail_putBody(email,'Kindly confirm you received this message.');
CkEmail_putFrom(email,'alice@example.com');
CkEmail_AddTo(email,'Bob','bob@example.com');

//  Request a return receipt.
CkEmail_putReturnReceipt(email,True);

Memo1.Lines.Add('ReturnReceipt = ' + IntToStr(Ord(CkEmail_getReturnReceipt(email))));

CkEmail_Dispose(email);