/usr/mail/username protections

[YATES, JOHN H.]

I now have umask 077 in /etc/stdcshrc so that mbox in the user's dir
gets no privs for group, but /usr/mail/username files get g:rw !!
Why is this and how can I prevent any group privs?

I also find some length 0 /usr/mail/username files out there, but
when I read my newmail and quit, mine gets deleted. Do I assume that
adduser creates a zero sized file for the user, but when it gets used
it gets deleted? If I can coerce the file to remain even if zero length,
at least I can forever put the "correct" protections on existing ones.

I alias mail to Mail, set mail = (60 /usr/mail/$LOGNAME), and in .mailrc
set ask askcc asksub

Thanks, John
yates at a.chem.upenn.edu