其實...老師第一天上課就有留E-Mail了
可是我上禮拜想寫信去問問題；兼要MSN，信卻被退回了！...

Undelivered Mail Returned to Sender

This is the Postfix program at host core.XXXX-XXXXX.com.

I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The Postfix program

我確定我沒抄錯啊！！