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From: jab@uokvax.UUCP
Newsgroups: net.unix-wizards
Subject: Re: /usr/spool/mail: 0777 or 0755? - (nf)
Message-ID: <5834@uiucdcs.UUCP>
Date: Wed, 22-Feb-84 23:13:22 EST
Article-I.D.: uiucdcs.5834
Posted: Wed Feb 22 23:13:22 1984
Date-Received: Fri, 24-Feb-84 01:35:30 EST
Lines: 12

#R:yale-com:-292600:uokvax:6200020:000:415
uokvax!jab    Feb 18 09:18:00 1984

If /usr/spool/mail (/usr/mail on System V) is writable, then people can remove
other people's mailboxes. Admittedly, the "sticky directory" idea that is in
one of the Berkeley systems (i.e. "+t" on directory means you can only unlink
files that you own) helps this.

I would hope that people on your system aren't malicious enough to do this, but
an accidental "rm -f" in the wrong directory can do wonders.

	Jeff