Thanx to Norman Wilson, immediately send the answer, and I solved the
problem. Its as follows ;
---------- Forwarded message ----------
Date: Tue, 15 Aug 95 15:01:25 -0400
From: Norman Wilson <norman_at_hprc.utoronto.ca>
To: balci_at_baum01.ege.edu.tr
Subject: mail problem
On many systems these days, binmail arranges to run as the user to whom
mail is being delivered, for various safety reasons; hence if that user
can't write in /var/spool/mail, the lockfile can't be created and mail
can't be delivered.
To allow this to work, but prevent users from removing others' mailboxes,
set the sticky bit on /var/spool/mail:
# chmod +t /var/spool/mail
# ls -lLd /var/spool/mail
drwxrwxrwt 2 root 1024 Aug 15 14:57 /var/spool/mail
#
(notice the `t' in the mode. In numbers this is mode 01777.)
The sticky bit on a directory means that anyone may create a file,
but no one except the super-user may remove (or rename) a file he
doesn't own.
The flag is useful to prevent havoc in /tmp as well.
Norman Wilson
University of Toronto
norman_at_hprc.utoronto.ca
Received on Tue Aug 15 1995 - 21:32:40 NZST