[exim] Trouble in yahoo

Hi,
I would like send to my adresse yahoo.fr by my Exim server but my
messages go to my spam folder.

I check my EMail:
From VALMIR Christophe Tue Apr 14 05:41:44 2009
Return-Path: <christophe.valmir@???>
Authentication-Results: mta175.mail.ac4.yahoo.com from=xxx.net;
domainkeys=pass (ok); from=xxx.net; dkim=pass (ok)
Received: from 88.191.X.X (EHLO athena.xxx.net) (88.191.X.X)

I check My server with port25.com.

==========================================================
Summary of Results
==========================================================
SPF check:          pass
DomainKeys check:   pass
DKIM check:         pass
Sender-ID check:    pass
SpamAssassin check: ham

The authentification is good but I understand why my message is in Spam
folder. Do you have Idea ?

Christophe