From f22ea7ba1875863890b486db3e5f448f99c1debc Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Thu, 07 Oct 2010 04:52:05 -0400
Subject: [PATCH] - Support SMTP Delivery Status Notifications - RFC3461 (#1486142)

---
 program/steps/mail/sendmail.inc |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/program/steps/mail/sendmail.inc b/program/steps/mail/sendmail.inc
index a9ecf2e..da79c2f 100644
--- a/program/steps/mail/sendmail.inc
+++ b/program/steps/mail/sendmail.inc
@@ -546,7 +546,13 @@
     $OUTPUT->send('iframe'); 
   }
 
-  $sent = rcmail_deliver_message($MAIL_MIME, $from, $mailto, $smtp_error, $mailbody_file);
+  // Handle Delivery Status Notification request
+  if (!empty($_POST['_dsn'])) {
+    $smtp_opts['dsn'] = true;
+  }
+
+  $sent = rcmail_deliver_message($MAIL_MIME, $from, $mailto,
+    $smtp_error, $mailbody_file, $smtp_opts);
 
   // return to compose page if sending failed
   if (!$sent)

--
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