/var/spool/mail --> ~/Inbox migration: how with smail?

[the lone gunman <lgunman@sewage.debian.org>]

I have a pretty vanilla Debian 2.0 setup as of now.  I installed smail
as my mta (or is it mda?).  I would like to change the default inbox
from /var/spool/mail/user to /home/user/Inbox.

I've never used smail at all, and I find mail systems very complex and
daunting.  Any hints?

Thanks!