/etc/qmail permissions

[Rodrigo Borges Pereira]

Hi!

I'm using bruce guenter's qmail RPM for some time now.
I'd like to know if it's possible to chmod 750 the directories under
/etc/qmail so that no one can go in there and check my configuration files,
without disrupting qmail's functioning. Here are the directories as they are
now:

drwxr-sr-x    2 alias    qmail        4096 Jun 18 23:42 alias
drwxr-xr-x    2 root     qmail        4096 May 30 20:28 control
drwxr-xr-x    2 root     qmail        4096 Apr 30 01:03 owners
drwxr-xr-x    2 root     qmail        4096 Apr 30 01:03 users

Thanks in advance.