[exim] Drop incoming mails that have a local domains from ex…

I'm trying to block the incoming mails that have a local domains in to
FROM header and don't comes from a internal server Like this example:

2006-09-11 13:28:58 1GMjwo-0007Sr-Lc <= pinco.pallo@???
H=(ip-63-114.quasar.net.id) [202.81.63.114] ...
2006-09-11 13:28:58 1GMjwo-0007Sr-Lc => pinco.pallo@???
F=<pinco.pallo@???> R=special T=remote_smtp H=mail.local.lan
[xxx.xxx.xxx.xxx] QT=1m28s
2006-09-11 13:28:58 1GMjwo-0007Sr-Lc Completed

I am trying some configurations but don't work.
How can do this?

Andrea