how to send emails to subdomain to the main domain's .qmail-default

I would like to
send all emails to subdomain to the main domain's .qmail-default file.


****@sub1.domain.com >>> ../domain/.qmail-default
****@sub2.domain.com >>> ../domain/.qmail-default
****@sub3.domain.com >>> ../domain/.qmail-default


I have configured as follows;
IN /var/qmail/control/virtualdomains
sub1.domain.com:domain.com
sub2.domain.com:domain.com
sub3.domain.com:domain.com

and in /var/qmail/control/rcphosts
sub1.domain.com
sub2.domain.com
sub3.domain.com

and reload with "qmailctl reload "

But when I send email from yahoo to
info@sub1.domain.com, did not go to the
info@domain.com. it goes to info@sub1.domain.com instead.

please let me know how can I set up virtualdomain.