下面是退信
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Hi. This is the qmail-send program at yahoo.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
<jzhao@universalballast.com>:
207.46.163.22 does not like recipient.
Remote host said: 554 <jzhao@universalballast.com>: Recipient address
rejected: Access denied
Giving up on 207.46.163.22.
