system-wide mailbox on aix

[W. W. Looi]

In article <1991Apr13.165851.11350 at grasp1.univ-lyon1.fr> wolf at grasp1.univ-lyon1.fr (Christophe Wolfhugel) writes:
>In article <_S7ERCI_=@linac.fnal.gov> looi at sutro.SFSU.EDU (W. W. Looi) writes:
>>Does anyone know why there are two system-wide mailboxes on AIX?
>>They locate in /usr/spool/mail/$USER and /usr/mail/$USER
>
>On some AIX (maybe all?) you can check that /usr/mail is linked to
>/usr/spool/mail as indicated here:
>
>lrwxrwxrwx   1 root     system   15 19 Mar 11:04 /usr/mail -> /usr/spool/mail
>
>That means that /usr/spool/mail/$USER and /usr/mail/$USER are the SAME file.
>
Any justification for doing this? The BSD I'm familiar with has only
one, that's /usr/spool/mail/$USER