spamassasin (maybe) make all disapear...!!

[Éric Noël]

Hello,

I has installed mailscanner on my new ubuntu-server 8.04

I had problems.....the spam does not appear in mailbox ( with a kind of 
{mail?  )
But nospam mail are ok. I had the

This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

On the end of each mail


I folow these tutorial:

https://help.ubuntu.com/community/MailScanner

In MailScanner.conf i had:
Spam Actions = deliver header "X-Spam-Status: Yes"
High Scoring Spam Actions = deliver header "X-Spam-Status: Yes"

Wher could i start now to resolve this problem?

Thanks

Eric Noel