Java

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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Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    //  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.

    CkEmail 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);

    System.out.println("ReturnReceipt = " + email.get_ReturnReceipt());
  }
}