program/steps/mail/compose.inc
@@ -240,6 +240,9 @@ $COMPOSE['reply_msgid'] = '<' . $in_reply_to . '>'; $COMPOSE['references'] = $MESSAGE->headers->references; // use message-ID as draft_id, same as in sendmail.inc $OUTPUT->set_env('draft_id', trim($MESSAGE->headers->get('message-id'), '<>')); } } else {