--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/steps/mail/sendmdn.inc	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,43 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | program/steps/mail/sendmdn.inc                                        |
+ |                                                                       |
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2008-2013, The Roundcube Dev Team                       |
+ |                                                                       |
+ | Licensed under the GNU General Public License version 3 or            |
+ | any later version with exceptions for skins & plugins.                |
+ | See the README file for a full license statement.                     |
+ |                                                                       |
+ | PURPOSE:                                                              |
+ |   Send a message disposition notification for a specific mail         |
+ |                                                                       |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com>                        |
+ +-----------------------------------------------------------------------+
+*/
+
+// only process ajax requests
+if (!$OUTPUT->ajax_call) {
+    return;
+}
+
+if (!empty($_POST['_uid'])) {
+    $sent = rcmail_send_mdn(rcube_utils::get_input_value('_uid', rcube_utils::INPUT_POST), $smtp_error);
+}
+
+// show either confirm or error message
+if ($sent) {
+    $OUTPUT->set_env('mdn_request', false);
+    $OUTPUT->show_message('receiptsent', 'confirmation');
+}
+else if ($smtp_error) {
+    $OUTPUT->show_message($smtp_error['label'], 'error', $smtp_error['vars']);
+}
+else {
+    $OUTPUT->show_message('errorsendingreceipt', 'error');
+}
+
+$OUTPUT->send();