Mails from linode ip go to spam in gmail

I know that this question is very popular, but I really hope that somebody can help me.

Message headers:

Delivered-To: ss@ss.ss
Received: by 10.216.42.7 with SMTP id i7csp410722web;
        Tue, 23 Oct 2012 15:15:37 -0700 (PDT)
Received: by 10.14.203.132 with SMTP id f4mr18989899eeo.11.1351030537206;
        Tue, 23 Oct 2012 15:15:37 -0700 (PDT)
Return-Path: <master@mydomain.test>
Received: from mydomain.test (mydomain.test. [178.79.180.***])
        by mx.google.com with ESMTP id j5si587844eeo.122.2012.10.23.15.15.36;
        Tue, 23 Oct 2012 15:15:37 -0700 (PDT)
Received-SPF: pass (google.com: domain of master@mydomain.test designates 178.79.180.*** as permitted sender) client-ip=178.79.180.***;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of master@mydomain.test designates 178.79.180.*** as permitted sender) smtp.mail=master@mydomain.test; dkim=pass header.i=@mydomain.test
Received: by mydomain.test (Postfix, from userid 1000)
    id BD1713FDDD; Wed, 24 Oct 2012 02:15:36 +0400 (MSK)
X-DKIM: OpenDKIM Filter v2.5.2 mydomain.test BD1713FDDD
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mydomain.test;
    s=mydomain; t=1351030536;
    bh=7AFTz7yao7EUZcU2/wfS8rMYZgp2DlBpgu1XZm/z7Aw=;
    h=To:Subject:From:Reply-To:Date;
    b=mtPuv10jznUoOyqIxWDP/2e5MeOIJwbIYrN+pWyckLhGvosOdim+MCxw7sSnowt1t
     cTE8W51oJc70pZ7UPSqBAc1BYNoPoyjrZYl6IVqCQ4Bmwj12ukeiYjXTd0wufbHBVA
     +ZKs/19mS2F6RI5+ld4BEiv2lY+v4XJzeuDnRV/U=
To: ss@ss.ss
Subject: Ежедневный отчет о расходе ресурсов по услуге Scale Server
From: noreply@mydomain.test
Reply-To: noreply@mydomain.test
Mime-Version: 1.0
Content-Type: multipart/related; type="multipart/alternative"; boundary="=-fmc_rel_4087fe999af5ffe404e22aa5db26a412"
Message-Id: <20121023221536.BD1713FDDD@mydomain.test></master@mydomain.test>

RDNS is looking to domain name. I've tried to send messages with php and with postfix smtp.

Any ideas?