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-rw-r--r--program/steps/mail/show.inc4
1 files changed, 4 insertions, 0 deletions
diff --git a/program/steps/mail/show.inc b/program/steps/mail/show.inc
index 4dcdec362..022edb0ed 100644
--- a/program/steps/mail/show.inc
+++ b/program/steps/mail/show.inc
@@ -72,6 +72,10 @@ if ($_GET['_uid'])
// give message uid to the client
$OUTPUT->set_env('uid', $MESSAGE['UID']);
$OUTPUT->set_env('safemode', intval($_GET['_safe']));
+
+ // check for unset disposition notification
+ if ($MESSAGE['headers']->mdn_to && !$MESSAGE['headers']->mdn_sent)
+ $OUTPUT->set_env('mdn_request', true);
$next = $prev = -1;
// get previous, first, next and last message UID