dovecot 服务无法启动？盼！盼！

guo8jun

做了2个mail主机，FC4和REDHAT9，FC4下的dovecot能用，REDHAT9下的dovecot服务启动时出错，看下面的提示：
[root@localhost root]# service dovecot restart
Shutting down IMAP daemon (dovecot): [失败]
Starting IMAP daemon (dovecot): [  确定  ]

又看了下log,不懂哪里出了问题，很郁闷！！
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Mar 16 11:14:56 localhost pop3-login: fd_send(-1) failed: Broken pipe
Mar 16 11:14:56 localhost pop3-login: fd_send(-1) failed: Broken pipe
Mar 16 11:14:56 localhost imap-login: fd_send(-1) failed: Broken pipe
Mar 16 11:14:56 localhost pop3-login: fd_send(-1) failed: Broken pipe
Mar 16 11:14:56 localhost imap-login: fd_send(-1) failed: Broken pipe
Mar 16 11:31:24 localhost dovecot: Dovecot starting up
Mar 16 11:31:25 localhost dovecot: child 7498 (auth) returned error 127
Mar 16 11:31:25 localhost dovecot: Auth process died too early - shutting down
Mar 16 11:31:25 localhost imap-login: fd_send(-1) failed: Broken pipe
Mar 16 11:31:25 localhost pop3-login: fd_send(-1) failed: Broken pipe