[exim] routing based on senders email addres and redirection…

Hello every body;
I´m newby using exim, so sorry if my question is a bit stupid. I´m trying
to configure exim to send all emails that the senders are in a file to one
transport, and if they aren´t they should be sended to a expecific email
address.
I configured a router using "senders" and a "lseach" to the file, but I´m
missed trying to send the other messages to the expecific email addres
(like a quarentine maildir).

Please, any clue.

Thanks a lot