qmail install question

["Budi Febrianto" <bfebrianto hotmail com>]

Hi,
I just downloaded qmail-1.03, daemontools-0.53 and ucspi-tcp-0.84, extract
and install.
I'm using "Life with qmail" for guide.

Im created an rc file...
>>>
exec env - PATH="/var/qmail/bin:$PATH"\
qmail-start "`cat /var/qmail/control/defaultdelivery`"
>>>

where /var/qmail/control/defaultdelivery is ./Mailbox

but... when i try to run the rc file, I have an error message
"env: ./Mailbox: No such file or directory

Should I created the ./Mailbox manually? How can I do that?

Thanks