錯誤訊息
This is the mail system at host mail.ublink.org. I'm sorry to have to inform you that your message could not 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 mail system (expanded from): unknown user: "spam"
看最後一句就可以了
The mail system (expanded from): unknown user: "spam"
沒有 spam 這個 USER
這封Mail 是轉寄過去的