小弟寄信時.會退回一封英文信
內容是這樣的.請問市啥原因ㄋ??

Message from yahoo.com.
Unable to deliver message to the following address(es).

<[email protected]>:
212.1.218.221 failed after I sent the message.
Remote host said: 554 delivery error: dd Sorry, your message to
cannot be delivered. This account is over quota.
- mta146.mail.tpe.yahoo.com

--- Original message follows.