I am trying to setup a MIME email system and I had it sending mail perfectly just with errors. I have made some switches and now it sends with no errors but is being caught by spam filters.

-Outlook adds the HTML message as an attachment thus placing it in spam..
-School account said it was not sent my the correct user (it was sending it as www.data but I add -f to fix it and now its being caught).
-Seems to go fine to gmail and yahoo...

Here are the headers from outlook that got the message as plain text but added the HTML as an attachment;

Microsoft Mail Internet Headers Version 2.0
Received: from VA10PWPEXC004.us.ad.xxx ([30.128.193.xxx]) by VAPWVBE016.us.ad.xxx with Microsoft SMTPSVC(6.0.3790.4675);
Thu, 5 Jan 2012 16:07:30 -0500
Received: from vaplpmr007.xxx ([198.22.82.xxx]) by VA10PWPEXC004.us.ad.xxx with Microsoft SMTPSVC(6.0.3790.4675);
Thu, 5 Jan 2012 16:07:30 -0500
Received: from vaplpmr007.xxx (vaplpmr007 [127.0.0.1])
by localhost (Postfix) with SMTP id C417B950039
for <xxxxxx>; Thu, 5 Jan 2012 16:07:32 -0500 (EST)
Received: from xxx (rrcs-24-172-204-102.central.biz.rr [24.172.204.xxx])
by vaplpmr007.xxx (Postfix) with ESMTP id 5F03F95000E
for <xxxxxx>; Thu, 5 Jan 2012 16:07:32 -0500 (EST)
Received: from localhost (localhost.localdomain [127.0.0.1])
by xxxxxx (Postfix) with ESMTP id 2EA211F20A8
for <xxxxxx>; Thu, 5 Jan 2012 16:08:09 -0500 (EST)
X-Virus-Scanned: amavisd-new at xxx
Received: from xxx ([127.0.0.1])
by localhost (xxx [127.0.0.1]) (amavisd-new, port 10024)
with ESMTP id DBLGJ4qaQ2I7 for <xxxxxx>;
Thu, 5 Jan 2012 16:08:08 -0500 (EST)
Received: by xxx (Postfix, from userid 33)
id 8E3FD1F20A9; Thu, 5 Jan 2012 16:08:08 -0500 (EST)
ToXxx: See forum rules)
Subject: xxx
X-PHP-Originating-Script: 0:MarketEmail2xxx
From:xxxxxx
Reply-To:xxxxxx
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary = xxxmarket4f0611387fca0
Message-Id: <20120105210808.8E3FD1F20A9xxx>
Date: Thu, 5 Jan 2012 16:08:08 -0500 (EST)
X-PMX-Version: 5.6.1.2065439, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2012.1.5.210028
Return-PathXxx: See forum rules)
X-OriginalArrivalTime: 05 Jan 2012 21:07:30.0453 (UTC) FILETIME=[093CB450:01CCCBEE]

--xxxmarket4f0611387fca0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: base64

--xxxmarket4f0611387fca0
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: base64


--xxxmarket4f0611387fca0--


Here is a look at my actual header setup;

//add From: header
$headers = 'From:' . $from . "\n";
$headers .= 'Reply-To:' . $from . "\n";
$headers .= 'Return-Path:' . $from . "\n";

//specify MIME version 1.0
$headers .= "MIME-Version: 1.0\n";

//unique boundary
$boundary = uniqid("xxxmarket");

//tell e-mail client this e-mail contains//alternate versions
$headers .= "Content-Type: multipart/mixed; boundary = $boundary\r\n\r\n";


//plain text version of message
$body = "--$boundary\r\n" .
"Content-Type: text/plain; charset=ISO-8859-1\r\n" .
"Content-Transfer-Encoding: base64\r\n\r\n";
//adds the remove me displaying email address
$urlplain = " http:/"."/xxx/x.php?i=" . $to1[$i];
$plainremove = $urlplain;
//Counts the length
$plaindumplength = strlen($plainremove);
//adds the remove to the string
$plaintxt .= $plainremove;
$body .= chunk_split(base64_encode($plaintxt));

//HTML version of message
$body .= "--$boundary\r\n" .
"Content-Type: text/html; charset=ISO-8859-1\r\n" .
"Content-Transfer-Encoding: base64\r\n\r\n";
//adds on the remove me displaying email address and link to php p$
$urltest = " http:/" . "/xxx/removeme?remove=" . $to1[$i];
$emaildump = "<p> This email was sent to " . $to1[$i] . " if you would like to $
//Counts the length
$dumplength = strlen($emaildump);
//adds the remove to the string
$htmltxt .= $emaildump;
$body .= chunk_split(base64_encode($htmltxt));
$body .= "--$boundary--";


Then the mail;
mail($to1[$i], $subject, $message, $headers, "-f $from"

);