Callback setup failed while verifying 请指教

wlandwl

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Thu 2006-04-27 16:45:35: <-- 550-Callback setup failed while verifying <1111@xxx.com.cn><br>
> Thu 2006-04-27 16:45:35: <-- 550-Called: 219.111.188.119<br>
> Thu 2006-04-27 16:45:35: <-- 550-Sent: MAIL FROM:<><br>
> Thu 2006-04-27 16:45:35: <-- 550-Response: 550 Sorry, this server is configured to refuse this sort of mail (to combat the SPAM problem)<br>
> Thu 2006-04-27 16:45:35: <-- 550-The initial connection, or a HELO or MAIL FROM:<> command was<br>
> Thu 2006-04-27 16:45:35: <-- 550-rejected. Refusing MAIL FROM:<> does not help fight spam, disregards<br>
> Thu 2006-04-27 16:45:35: <-- 550-RFC requirements, and stops you from receiving standard bounce<br>
> Thu 2006-04-27 16:45:35: <-- 550-messages. This host does not accept mail from domains whose servers<br>
> Thu 2006-04-27 16:45:35: <-- 550-refuse bounces.<br>
> Thu 2006-04-27 16:45:35: <-- 550 "This message is from a non-existant email address."<br>
请问出现这种情况，是怎么回事。<br>
如果是我这边服务器的问题，应该怎么设置或怎么解决。谢谢! <br>