163系统退信是这样的:<br>
This message is generated by COREMAIL email system.<br>
I'm sorry to have to inform you that the message returned<br>
<br>
<br>
你发送到jttdez@scc.gov.cn的邮件由于以下原因被退回 : jttdez@scc.gov.cn SMTP error, RCPT TO: 550 5.7.1 Unable to relay for jttdez@scc.gov.cn