[exim] Same Name, Different accounts?

Help! :)

I'm running Exim 3.36 with SpamAssassin 3.0.2 and ClamAV. (Not that all
of that matters)

I'm migrating several customers off of a NT box over to my Debian server.
The problem that I'm having is most of my customers us the email address
of INFO@???.

I've tried to mess with my /etc/alias file but no luck. Is there something
I can do in my exim.conf file to set up INFO as an alias by domain to it's
correct user?

Any help on this would be great!

Thanks, Blair