Your server IP address is in the SORBS DNSBL database
退信信息：
Hi.Thisistheqmail-sendprogramatmx28.dns.com.cn.
I'mafraidIwasn'tabletodeliveryourmessagetothefollowingaddresses.
Thisisapermanenterror;I'vegivenup.Sorryitdidn'tworkout.
94.79.54.153doesnotlikerecipient.
Remotehostsaid:5505.7.0YourserverIPaddressisintheSORBSDNSBLdatabase
,bye
Givingupon94.79.54.153.
94.79.54.153doesnotlikerecipient.
Remotehostsaid:5505.7.0YourserverIPaddressisintheSORBSDNSBLdatabase
,bye
Givingupon94.79.54.153.
出现以上退信信息的时候，登录http://dnsbl.sorbs.net/lookup.shtml 网站查询被列入黑名单情况
查询结果