POSTfix配置好后无法收信，日志如下。

henku126

Sep 16 13:28:15 mail maildrop[3753]: Cannot have world/group permissions on the filter file - for your own good.
Sep 16 13:28:15 mail postfix/smtp[3746]: 06582134B32: to=<office@cche.org>, relay=127.0.0.1[127.0.0.1]:10024, delay=5.7, delays=5.1/0.01/0/0.61, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=02577-04, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as A0406134B46)
Sep 16 13:28:15 mail postfix/qmgr[2587]: 06582134B32: removed
Sep 16 13:28:15 mail postfix/pipe[3752]: A0406134B46: to=<office@cche.org>, relay=maildrop, delay=0.04, delays=0.02/0.01/0/0.01, dsn=4.3.0, status=deferred (temporary failure. Command output: maildrop: Cannot have world/group permissions on the filter file - for your own good. )

注： 收不到邮件，以上是日志。只有少数部分用户收邮件是有这种提示。其它用户收发正常；所有用户的MAILBOX下目录文件权限一样。请大侠指教。