What would cause /bin/mail to not let me edit messages?  On my most -current
box, mail does:
>~v
/tmp/Re010223: Permission denied
Fatal error in process.
(continue)

It does this even to *root*.  Why?  How?  I can't see how I could create
a file I can't read.  Unless the mode is wrong...

It looks like 0600.  Hmm.

-s
p.s.: My problem with mail not locking mailboxes was that /var/mail was
not writable by me.  I'm not sure it should be, but 1777 fixed it.