The original message was received at Thu, 9 Feb 2006 17:07:43 +0800 from [192.168.12.8]

----- The following addresses had permanent fatal errors -----
(reason: 554-ausc60pc105.us.dell.com)

----- Transcript of session follows ----- ... while talking to smtp.ins.dell.com.:
<<< 554-ausc60pc103.us.dell.com
<<< 554 Connections from this sending hostname Unknown, IP address of: 220.160.***.*** are being rejected due to low SenderBase Reputation score (below -2). Your SenderBase organization: 32036. See http://www.senderbase.org/ for more information.
... while talking to smtp2.ins.dell.com.:
>>> QUIT
<<< 554-ausc60pc105.us.dell.com
<<< 554 Connections from this sending hostname Unknown, IP address of: 220.160.***.*** are being rejected due to low SenderBase Reputation score (below -2) or due to bad DNS PTR record for your mail server. Please check your DNS PTR for 220.160.55.1. Forward and reverse DNS entries must match for 220.160.55.1. Your SenderBase organization: 32036. See http://www.senderbase.org/ for more information.
554 5.0.0 Service unavailable

国外的邮件服务器对域名和ip的解析要求比较高,最好做下反向解析!

在网站查讯得到下面的信息,是什么问题呢?

Enter another IP address to check:

Here is the result of your query:

220.160.***.*** is listed as an open proxy in dnsbl.njabl.org.

220.160.***.*** is listed in blackholes.njabl.org: China blocked by china.blackholes.us

220.160.***.*** has no PTR

The following comment is associated with this record: open proxy
It was added to the list: Mon Dec 13 13:00:07 2004 EST

Click here if you are not sure what 'open proxy' means.

click here to request removal and retesting of this IP.
click here to see if 220.160.***.*** is in other dnsbls.


--------------------------------------------------------------------------------
This IP was last tested 2004-12-13 12:58:57.
--------------------------------------------------------------------------------


If we have any spams or other evidence on file for that address, they will be displayed below.
If we have recent relaytest messages in our database, they will be displayed below as well.
--------------------------------------------------------------------------------220.160.***.***:hc:3128: >> CONNECT 209.208.0.16:25 HTTP/1.0\r\n
220.160.***.***::hc:3128: >> \r\n
220.160.***.***::hc:3128: >> help njablproxytest\r\n
220.160.***.***::hc:3128: << HTTP/1.0 200 Connection established\r\n
220.160.***.***::hc:3128: << \r\n
220.160.***.***::hc:3128: HTTP request successeful (200)
220.160.***.***::hc:3128: << 220 rt.njabl.org ESMTP Sendmail 8.11.6/8.11.6; Mon, 13 Dec 2004 12:59:00 -0500\r\n
220.160.***.***::hc:3128: << 214-2.0.0 njabl.org proxytest response to 220.160.***.***:\r\n
220.160.***.***::hc:3128: << 214 2.0.0 End of HELP info\r\n
220.160.***.***: hc:3128 open

请问一下,如何做反向解析啊.得让中国电信来做吧...

向ISP申請做反向解析...