Zig

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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Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main() !void {
    // 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.

    const email = try chilkat.Email.init();
    defer email.deinit();
    email.setSubject("Please confirm receipt");
    email.setBody("Kindly confirm you received this message.");
    email.setFrom("alice@example.com");
    email.addTo("Bob", "bob@example.com") catch {};

    // Request a return receipt.
    email.setReturnReceipt(true);

    std.debug.print("ReturnReceipt = {}\n", .{email.getReturnReceipt()});
}