need help!

I install Qmail the system the main domain is:yingkou.net.cn but another virtual domain all has the error like below why?   thank you -- Hi. This is the qmail-send program at ns1.yingkou.net.cn.I'm afraid I wasn't able to deliver your message to the

need help

hi all:  I use qmail+vpopmail it's ok .I added about 10 domains but now when i add a new doamins  and add a new mailbox it's wrong . system telme list : thank you   - Hi. This is the qmail-send program at ns1.yingkou.net.cn.I'm afraid I wasn't able to de