请教个系统退信问题！

kks168

The attached message had PERMANENT fatal delivery errors!
After one or more unsuccessful delivery attempts the attached message has been removed from the mail queue on this server.  The number and frequency of delivery attempts are determined by local configuration parameters.
YOUR MESSAGE WAS NOT DELIVERED TO ONE OR MORE RECIPIENTS!
Failed address: tnwcam@123.com
--- Session Transcript ---
Mon 2007-08-20 08:04:53: Parsing message <xxxxxxxxxxxxxxxxxx\pd35000026398.msg>
Mon 2007-08-20 08:04:53: *  From: kinsan@xxx.com  Mon 2007-08-20 08:04:53: *  To: tnwcam@123.com Mon 2007-08-20 08:04:53: *  Subject: Test  Mon 2007-08-20 08:04:53: *  Message-ID: <[email=002501c7e2c6$1ba0e640$3700a8c0@pc]002501c7e2c6$1ba0e640$3700a8c0@pc[/email]>
Mon 2007-08-20 08:04:53: Attempting SMTP connection to [123.com]  Mon 2007-08-20 08:04:53: Resolving MX records for [123.com] (DNS Server: 192.168.0.6)...
Mon 2007-08-20 08:04:53: *  P=010 S=000 D=123.com TTL=(1440) MX=[mail.123.com] {123123.123.1}  Mon 2007-08-20 08:04:53: *  P=020 S=001 D=123.com TTL=(1440) MX=[mail2.123.com] {123123.123.2}  Mon 2007-08-20 08:04:53: Attempting SMTP connection to [123123.123.1:25]  Mon 2007-08-20 08:04:53: Waiting for socket connection...
Mon 2007-08-20 08:04:53: *  Connection established (192.168.0.7:4248 -> 123123.123.1:25)  Mon 2007-08-20 08:04:53: Waiting for protocol to start...
Mon 2007-08-20 08:04:53: <-- 220-s_ops3 Microsoft SMTP MAIL ready at Mon, 20 Aug 2007 07:32:52 +0700 Version: 5.5.1774.114.11  Mon 2007-08-20 08:04:53: <-- 220 ESMTP spoken here  Mon 2007-08-20 08:04:53: --> EHLO xxxx.com  Mon 2007-08-20 08:04:53: <-- 250-s_ops3 Hello [23.0.16.122]  Mon 2007-08-20 08:04:53: <-- 250-AUTH=NTLM LOGIN  Mon 2007-08-20 08:04:53: <-- 250-SIZE 2097152  Mon 2007-08-20 08:04:53: <-- 250-PIPELINING  Mon 2007-08-20 08:04:53: <-- 250-8bitmime  Mon 2007-08-20 08:04:53: <-- 250-TURN  Mon 2007-08-20 08:04:53: <-- 250 TLS  Mon 2007-08-20 08:04:53: --> MAIL From:<kinsan@xxx.com> SIZE=5431  Mon 2007-08-20 08:04:53: <-- 250 kinsan@xxx.com....Sender OK  Mon 2007-08-20 08:04:53: --> RCPT To:<tnwcam@123.com>  Mon 2007-08-20 08:04:53: <-- 550 Unable to relay for tnwcam@123.com  Mon 2007-08-20 08:04:53: --> QUIT
--- End Transcript ---
: Message contains [1] file attachments

wxhsh

被对方邮服拒了，可能进了黑名单。

kks168

哦，哪真倒霉！
我再向对方确认一下看看。不过用 Yahoo 也会同样出错哦!
另外请问有方法能让今后都不让列入黑名单？