問題八

1. 學生繳交作業時，moodle 會寄出一封信給學生自己，但寄信者 From 部分為空白，因此，被 Yahoo 退信。，遠端回應訊息如下：

   遠端MTA回應的錯誤訊息:
   
   554 <xxxxxxxx@yahoo.com>...5.7.9 Message not accepted for policy reasons.
   See http://postmaster.yahoo.com/errors/postmaster-28.html
   

2. 修改程式 lib/moodlelib.php：將寄信者設定為 noreply。

   [root@dywang moodle23]# diff -uN ../moodle/lib/moodlelib.php lib/moodlelib.php 
   --- ../moodle/lib/moodlelib.php	2012-08-10 08:05:01.000000000 +0800
   +++ lib/moodlelib.php	2014-09-05 13:48:47.965062189 +0800
   @@ -5293,7 +5298,9 @@
            $mail->From     = $CFG->noreplyaddress;
            $mail->FromName = $from;
        } else if ($usetrueaddress and $from->maildisplay) {
   -        $mail->From     = $from->email;
   +        // Changing this due to new DMARC policy requirements
   +        $mail->From     = $CFG->noreplyaddress;
            $mail->FromName = fullname($from);
        } else {
            $mail->From     = $CFG->noreplyaddress;