i go into spam when sending with spamassasin???

Every time i send email to a my customer using SPAMCATCHER on windows with outlook, i go into his spam folder, why?
this is header:

Return-Path: my.name@mydomain.com
X-Spam-Checker-Version: SpamAssassin 3.2.4 (2008-01-01) on rxxxxxx.ovh.net
X-Spam-Status: No, score=-99.9 required=6.0 tests=ALL_TRUSTED,AWL,
X-Original-To: info@customerdomain.com
Delivered-To: info.customerdomain@r23315.ovh.net
Received: from [] (host79-126-dynamic.9-79-r.retail.xxxx.it [7x.x.1xx.7x])
by rxxxxxx.ovh.net (Postfix) with ESMTPA id 860084FB1F
for info@customerdomain.com; Thu, 18 Jun 2009 12:28:04 +0200 (CEST)
Message-ID: 4A3A16B3.10803@mydomain.com
Date: Thu, 18 Jun 2009 12:28:03 +0200
From: “My Name @ mydomain.commy.name@mydomain.com
User-Agent: Thunderbird (X11/20090105)
MIME-Version: 1.0
To: CUSTOMER NAME info@customerdomain.com
Subject: [SPAM] Re: MAIL E SPAM
References: 2A57A8AEC5464B54B974FD9A017E40F1@SERVER
In-Reply-To: 2A57A8AEC5464B54B974FD9A017E40F1@SERVER
Content-Type: multipart/alternative;
X-Antivirus: AVG for E-mail 8.5.374 [270.12.77/2184]
X-Antispam: YES; Spamcatcher 5.2.1. Score 91