Swift

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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Swift


func chilkatTest() {
    //  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.

    let email = CkoEmail()!
    email.subject = "Please confirm receipt"
    email.body = "Kindly confirm you received this message."
    email.from = "alice@example.com"
    email.add(to: "Bob", emailAddress: "bob@example.com")

    //  Request a return receipt.
    email.returnReceipt = true

    print("ReturnReceipt = \(email.returnReceipt)")

}