为什么我无法发送,帮忙看看什么原因?是dns的原因吗?

阿拉伯

我用电信的宽带线路发退信,<br>
网通的线路发也退信<br>
后来我用联通的线路就没有退信<br>
请问是什么原因?<br>
<br>
<br>
<br>
<br>
以下是退信内容:<br>
<br>
The attached message had PERMANENT fatal delivery errors!<br>
<br>
After one or more unsuccessful delivery attempts the attached message has<br>
been removed from the mail queue on this server. The number and frequency<br>
of delivery attempts are determined by local configuration parameters.<br>
<br>
YOUR MESSAGE WAS NOT DELIVERED TO ONE OR MORE RECIPIENTS!<br>
<br>
Failed address: XXX@XXXXX.co.uk<br>
<br>
--- Session Transcript ---<br>Tue 2005-01-18 14:34:31: Parsing Message <xxxxxxxxxxxxxxxxxx\pd50000000159.msg><br>Tue 2005-01-18 14:34:31: From: c@XXXXX.com(已修改)<br>Tue 2005-01-18 14:34:31: To: T@XXXX.co.uk(已修改)<br>Tue 2005-01-18 14:34:31: Subject: test<br>Tue 2005-01-18 14:34:31: Message-ID:<br>Tue 2005-01-18 14:34:31: MX-record resolution of [XXXXX.co.uk] in progress (DNS Server: 202.102.128.68)...<br>Tue 2005-01-18 14:34:34: P=010 D=XXX.co.uk TTL=(60) MX=[mailgate.XXX.co.uk] {212.41.178.241}<br>Tue 2005-01-18 14:34:34: Attempting MX: P=010 D=XXX.co.uk TTL=(60) MX=[mailgate.XXX.co.uk] {212.41.178.241}<br>Tue 2005-01-18 14:34:34: Attempting SMTP connection to [212.41.178.241 : 25]<br>Tue 2005-01-18 14:34:34: Waiting for socket connection...<br>Tue 2005-01-18 14:34:34: Socket connection established (127.0.0.1 : 1411 -> 212.41.178.241 : 25)<br>Tue 2005-01-18 14:34:34: Waiting for protocol initiation...<br>Tue 2005-01-18 14:34:50: <-- 220 ok RsProxyServer Ready<br>Tue 2005-01-18 14:34:50: --> EHLO ###.com(已修改)<br>Tue 2005-01-18 14:34:50: <-- 250-RsProxyServer says hello<br>Tue 2005-01-18 14:34:50: <-- 250-SIZE 0<br>Tue 2005-01-18 14:34:50: <-- 250-8BITMIME<br>Tue 2005-01-18 14:34:50: <-- 250-DSN<br>Tue 2005-01-18 14:34:50: <-- 250-ETRN<br>Tue 2005-01-18 14:34:50: <-- 250-AUTH=LOGIN<br>Tue 2005-01-18 14:34:50: <-- 250 EXPN<br>Tue 2005-01-18 14:34:50: --> MAIL From:<c@XXX.com> SIZE=1119<br>Tue 2005-01-18 14:34:50: <-- 505 Error: Client was not authenticated<br>
--- End Transcript ---<br>
: Message contains [1] file attachments<br>

goxia

客户没有被验证，有SMTP认证

阿拉伯

请问是我的原因还是客户的原因?<br>
应该如何解决?<br>
谢谢<br>
<br>

siwaxianduo

请高手具体讲解一下！！！