Routing users - is this possible to implement?

I am trying to set up qmail-frontend to our mailsystem, such way that some of mailboxes are on this qmail machine, and it SHOULD route all unknown mail to another server - is this possible? I do recall reading something on some webpage about this, but...help? Please? --

Re: Routing users - is this possible to implement?

I am trying to set up qmail-frontend to our mailsystem, such way that some of mailboxes are on this qmail machine, and it SHOULD route all unknown mail to another server Use .qmail-default for user alias or a virtual domain with exceptions through users/assign. Regards, Frank