[exim] address rewrite not working

I'm trying to rewite the To:<adderss> for all email from
test@??? but the rules are not working.

I have tried the follow in configs/rewrite


begin rewrite

test@??? test@??? t # by my understanding this should work

and then I tried

test@??? test@??? tFfscs # and the should but will be
over kill.

Thanks
G