[Exim] How to - anything to one main account?

I would like to setup one of my clients so that anything@??? will
resolve to one account. How is this done? I have setup the aliases file
with hisdomain.com: username but email sent to anything@??? show
as errors and route to my root account.

For future support requests and questions, please use
rt-admin@???

Thanks!

Susanne Bullo
Owner, Sweet Homes Web Services
http://www.sweethomes.com