“无法打开”/ etc / mail / trusted-users“：组可写目录”

[root@arcade mail]# ls -l /etc/ | grep mail; ls -l /etc/mail; service sendmail start drwxr-xr-x. 2 root root 4096 2011-01-27 20:06 mail -rw-r--r-- 1 root root 272 2009-11-17 21:13 mailcap -rw-r--r-- 1 root root 1968 2010-10-26 14:44 mail.rc total 192 -rw-r--r-- 1 root root 469 2007-08-27 11:25 access -rw-r-----. 1 root root 12288 2011-01-27 20:06 access.db -rw-r--r--. 1 root root 0 2010-09-30 14:25 aliasesdb-stamp -rw-r--r-- 1 root root 233 2007-04-12 15:35 domaintable -rw-r-----. 1 root root 12288 2011-01-27 20:06 domaintable.db -rw-r--r-- 1 root root 5584 2010-03-27 21:10 helpfile -rw-r--r-- 1 root root 64 2007-04-12 15:35 local-host-names -rw-r--r-- 1 root root 997 2007-04-12 15:35 mailertable -rw-r-----. 1 root root 12288 2011-01-27 20:06 mailertable.db -rwxr-xr-x 1 root root 2700 2008-12-19 13:23 make -rw-r--r-- 1 root root 92 2008-12-03 18:29 Makefile -rw-r--r-- 1 root root 58439 2010-03-27 21:10 sendmail.cf -rw-r--r-- 1 root root 7202 2008-12-03 18:29 sendmail.mc -rw-r--r-- 1 root root 41521 2010-03-27 21:10 submit.cf -rw-r--r-- 1 root root 941 2010-03-27 21:09 submit.mc -rw-r--r-- 1 root root 127 2007-04-12 15:35 trusted-users -rw-r--r-- 1 root root 1847 2007-04-12 15:35 virtusertable -rw-r-----. 1 root root 12288 2011-01-27 20:06 virtusertable.db Starting sendmail: 451 4.0.0 /etc/mail/sendmail.cf: line 87: fileclass: cannot open '/etc/mail/local-host-names': Group writable directory 451 4.0.0 /etc/mail/sendmail.cf: line 596: fileclass: cannot open '/etc/mail/trusted-users': Group writable directory [FAILED] 

/etc/mail和/etc/mail/trusted-users都不可以分组写入。 为什么sendmail抱怨？

 # chmod gw /etc # chown root:root /etc