Sendmail startup fails

From: decrepit (_at_netscape)
Date: 11/28/05 

Date: Mon, 28 Nov 2005 19:04:15 +0800

Hi, I'm an enthusiastic relative newby to linux, been using core3 for a
while OK. Recently at start up I'm getting these failure notices.---

Nov 28 11:22:19 localhost sendmail: sendmail startup failed
Nov 28 11:22:19 localhost sendmail: /etc/mail/submit.cf: line 545:
fileclass: cannot open '/etc/mail/trusted-users': World writable directory
Nov 28 11:22:19 localhost sendmail: sm-client startup failed

Does this mean the permissions on /etc/mail/trusted-users is too
loose???? Cause this is what they are. ---

permissions of /etc/mail/trusted-users
File owner root
File group root
owner read write
group read
others read
(-rw-r-r-, 644)

I'd be gratefull if anybody's got some idea what's going on here. I've
also recently enabled and disabled selinux, has that had some effect???

regards Mike.