Analysing email header from hotmail for message marked as spam
===

I have a simple PHP script which generates a single email to a user on my site.  For some reason, most messages are getting sent to user's spam folders.  I set up a hotmail account to test this, and I'm now trying to analyse the header to check why it is getting added to the spam folder.

The header I am getting is included below.  There doesn't appear to be any information relating to spam (i.e. spamassassin).  I'm wondering if anyone can detect what the issue might be?

    x-store-info:4r51+eLowCe79NzwdU2kRyU+pBy2R9QCj0/8P6fDMVumMo6iGJG5XQGQsGw4y+KC5jGdX6A7+/ZVHRw3c8psWXtc+cAfssqe5kw3LdG9RbC+kh049fg5aL5vFishJNonRedbn/JCR2Y=
    Authentication-Results: hotmail.com; sender-id=pass (sender IP is 208.53.158.38) header.from=info@****.com; dkim=pass header.d=****.com; x-hmca=pass
    X-SID-PRA: info@****.com
    X-Message-Status: n:0:n
    X-SID-Result: Pass
    X-DKIM-Result: Pass
    X-AUTH-Result: PASS
    X-Message-Delivery: Vj0xLjE7dXM9MDtsPTA7YT0wO0Q9MjtHRD0yO1NDTD02
    X-Message-Info: M98loaK0Lo1tWPCbe4OE0UbDdVDXEICZZMNsQz6Wthy3jeg8lyZ+D9euQ2riH1WvmBV23btdBFelBmKMH/9LOMR9or7uhXgxLWPa0gAZnJxsZCwy+xyGPBu8cHXLoyzG0CR/fKSJcN+zLjJCNkZvew==
    Received: from itchy.cirtexhosting.com ([208.53.158.38]) by COL0-MC2-F40.Col0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4900);
    	 Sun, 22 Jul 2012 16:56:31 -0700
    DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=****.com; s=default;
    	h=Subject:To:From; bh=ZwVnoaT/AbcAu6/7wnV5p3ZMSyLI5Eg9h9kKTJTmUL4=;
    	b=LTP74QdOU6Yt71wIr+J3PKWQUnGLUKRyU/Ps+ZM+OPgGOwfAeAvbPVemSl+dEh2u0VYtiuCdl5WvSK5zzQh+OV4KiBcy0xNj1vaRnBuUORgBY+SEIXu5TgLf3CbEZY0u;
    Received: from itchy.cirtexhosting.com ([208.53.158.38]:26249 helo=localhost)
    	by itchy.cirtexhosting.com with esmtpsa (TLSv1:AES256-SHA:256)
    	(Exim 4.77)
    	(envelope-from <info@****.com>)
    	id 1St60G-0000kF-Oq
    	for ****@hotmail.com; Sun, 22 Jul 2012 19:56:01 -0400
    From: Marvelous Monthly Mix Up <info@****.com>
    To: ****@hotmail.com
    Subject: Welcome to the Marvelous Monthly Mix Up
    X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
    X-AntiAbuse: Primary Hostname - itchy.cirtexhosting.com
    X-AntiAbuse: Original Domain - hotmail.com
    X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12]
    X-AntiAbuse: Sender Address Domain - ****.com
    X-Source: 
    X-Source-Args: 
    X-Source-Dir: 
    Return-Path: info@****.com
    Message-ID: <COL0-MC2-F40nkB4ltF00b5209d@COL0-MC2-F40.Col0.hotmail.com>
    X-OriginalArrivalTime: 22 Jul 2012 23:56:31.0807 (UTC) FILETIME=[9E28C4F0:01CD6865]