[Exim] getting email

Hi again guys.

I have a question for you.

I have exim runing in a linux box to control the domain foo.com. When someone send emails to richardp@??? the message gets the richardp mailbox because richardp is a localpart in the linux box, but how can i do to get email to non-localparts address without sending an error message back to the sender.

Thanks,

Richard
richardp@???