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hotmail的退信内容
收件人电子邮件服务器出现 SMTP 通信问题。请与系统管理员联系。
<mail.xxxxxx.cn #5.5.0 smtp;550 DY-001 Unfortunately, messages from 221.238.13.197 weren't sent. Please contact your Internet service provider. You can tell them that Hotmail does not relay dynamically-assigned IP ranges. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.>