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我使用一台window2000上的SMTP服务来中继内网exchange的邮件。现在发现收没有问题。而发送则有些问题<br>
1。发送到gd.gov.cn外部邮箱正常。邮箱能收到邮件。<br>
2。发送给163.net,返回的错误邮件是<br>
This is an automatically generated Delivery Status Notification.<br>
<br>
Delivery to the following recipients failed.<br>
<br>XXXXXXX@163.net<br>
<br>
3。发送给21cn.com,返回的错误邮件是:<br>
This is an automatically generated Delivery Status Notification.<br>
<br>
Unable to deliver message to the following recipients, due to being unable to connect successfully to the destination mail server.<br>
<br>xxxxxx@21cn.com<br>
<br>
而使用其他邮箱往21.com, 163.net发送都是正常的。window2000上有合法的IP、域名和合法的MX邮件交换记录。我头都大了。<br>
<br>
谁能指点一下?<br>
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