[exim] SpamAssassin Problems

Hello friends!

It maybe a silly question from a newbie, but i would like a help :)
i'm having a little trouble about the spam assassin config. I have
already folowd up all the tutorial in the internet i found. Everything
semms to be working and running correctly (ny the test i do) but the
only poroblem is that none header is written in the email (Like X-Spam-).

how do i config my SA to write this headers in my email?!


Thanks!

Eddie