Postfix errors

Running RH9 OOB

Removed sendmail, clean install of Postfix, local mail delivery doesn't
work.

Then I changed home_mailbox = Mailbox and still doesn't work. (where I
eventually want it)

From various posts everywhere, this should just work. What am I doing
wrong?

The mail just sits in the queue.

I'm also getting this error in the logs which escapes me because the
fiel exists with the correct permissions and correct path.

fatal: open database /etc/postfix/aliases.db: Invalid argument