求救！（菜鸟）各位大虾请多指教，不胜感激！！！！

hbljb

为什么我的邮件服务器只能收，不能发？各位大虾请多指教，不胜感激！！！！<br>
网内收发正常<br>
The attached message had transient non-fatal delivery errors<br>
<br>
THIS IS A WARNING MESSAGE ONLY - YOU DO NOT NEED TO RESEND YOUR MESSAGE!<br>
<br>
This server is configured to automatically retry delivery at configured<br>
intervals. Subsequent attempts to deliver this message are pending.<br>
<br>
Failed address: hbljb@21cn.com<br>
<br>
--- Session Transcript ---<br>Parsing Message <C:\MDAEMON\Remoteq\pd50000011676.msg><br>From: hbljb@szppm.com<br>To: hbljb@21cn.com<br>Subject: hi<br>Message-ID: <00d501c4107b$c8029210$3201a8c0@szppm><br>MX-record resolution of [21cn.com] in progress (DNS Server: 192.168.1.1)...<br>P=010 D=21cn.com TTL=(119) MX=[mta2.21cn.com] {61.140.60.70}<br>P=010 D=21cn.com TTL=(119) MX=[mta.21cn.com] {61.140.60.20}<br>Attempting MX: P=010 D=21cn.com TTL=(119) MX=[mta.21cn.com] {61.140.60.20}<br>Attempting SMTP connection to [61.140.60.20 : 25]<br>Waiting for socket connection...<br>Winsock Error 10061 The other host is either down or has refused to connect with you at that IP and/or on that port.<br>Attempting MX: P=010 D=21cn.com TTL=(119) MX=[mta2.21cn.com] {61.140.60.70}<br>Attempting SMTP connection to [61.140.60.70 : 25]<br>Waiting for socket connection...<br>Winsock Error 10061 The other host is either down or has refused to connect with you at that IP and/or on that port.<br>This message is 60 minutes old; it has 0 minutes left in this queue<br>Primary queue lifetime exceeded; message placed in retry queue<br>
--- End Transcript ---<br>
: Message contains [1] file attachments<br>

jiawang5211

两种可能：<br>
1、你的邮件服务器的ip不是直连<br>
2、DNS设置有问题

cplussz

DNS怎么设啊?我21CN的mail收不到,不知道能不能发