请教！！qmail 邮件无法投递

nuler

我的qmail smtp,pop都是正常工作!但是无法收到邮件
qmailctl stat 显示是：
/service/qmail-send: up (pid 945 0 seconds
/service/qmail-send/log: up (pid 2785) 897 seconds
/service/qmail-smtpd: up (pid 2773) 897 seconds
/service/qmail-smtpd/log: up (pid 9456) 0 seconds
messages in queue: 20
messages in queue but not yet preprocessed: 20
/service/qmail-pop3d: up (pid 9453) 0 seconds
/service/qmail-pop3d/log: up (pid 2767) 897 seconds
这个要怎么解决呀！！
急！ 我都搞了好几天了！