Outlook Receiving Mails in HTML Code - php

Question

In my project i have done some email code to receive the order details, 1 mail to admin and other mail for user..
But some users and admins are receiving the emails with html code.. I checked in many ways with gmail, webmail.. All are displaying good.. Finally I tested with outlook and in outlook mail was getting in html code.. By enquiring the users they said that they r using outlook.. So that issue was with outlook I think so..
Can anyone help me to solve this issue.. Here is the source code which was used for displaying in email message.
$to = $obj_check_out->email;
$subject = "NEW YORK PRODUCT ORDER";
$headers = "MIME-Version: 1.0\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1\r\n";
$headers .= "From: Instyle Customer Accounts <vamsi#mail.com>" . "\r\n";
$message = '<table width="100%" align="center">
<tbody><tr><td bgcolor="#393939">
<br>
<br>
<table cellspacing="0" cellpadding="0" width="650" border="0" align="center">
<tbody>
<tr>
<td width="10" bgcolor="#efefef">
<img src="images/newsletter/top_left.jpg" class="CToWUd">
</td>
<td width="630" height="92" bgcolor="#efefef" background="images/newsletter/top_bg.jpg">
<table width="630">
<tbody>
<tr>
<td width="514">
<font color="#333333" style="font-family:Tahoma;font-size:12px">
<br>
<b><a target="_blank" href="#"><span class="il">NEWYORK</span>.COM</a> ORDER CONFIRMATION</b> </font>
<font color="#333333" style="font-family:Tahoma;font-size:10px">[ DATE: '.$response["date_ordered"].' ]</font>
</td>
<td width="104" align="right">
<font color="#333333" style="font-family:Tahoma;font-size:12px">
<br>
<b>ORDER#:</b></font>
<font color="#333333" style="font-family:Tahoma;font-size:10px"> '.$response["order_log_id"].'</font>
</td>
</tr>
</tbody>
</table>
<br>
</td>
<td width="10" bgcolor="#efefef">
<img src="images/newsletter/top_right.jpg" class="CToWUd">
</td>
</tr>
<tr>
<td bgcolor="#efefef"> </td>
<td bgcolor="#efefef">
<font color="#333333">
<table cellspacing="0" cellpadding="2" width="630" border="0">
<tbody>
<tr>
<td height="35" bgcolor="#767676" background="images/newsletter/bar_bg.jpg" colspan="2">
<font color="#ffffff" style="font-family:Tahoma;font-size:12px">
<b>SHIPPING DETAILS</b></font>
</td>
</tr>
<tr>
<td width="170"> <font style="font-family:Tahoma;font-size:10px"><b>Name :</b></font></td>
<td width="452"><font style="font-family:Tahoma;font-size:10px">'.$response["firstname"].' '.$response["lastname"].'</font></td>
</tr>
<tr>
<td> <font style="font-family:Tahoma;font-size:10px"><b>Address :</b></font></td>
<td><font style="font-family:Tahoma;font-size:10px">'.$response["ship_address1"].' '.$response["ship_address2"].'</font></td>
</tr>
<tr>
<td> <font style="font-family:Tahoma;font-size:10px"><b>City :</b></font></td>
<td><font style="font-family:Tahoma;font-size:10px">'.$response["ship_city"].'</font></td>
</tr>
<tr>
<td> <font style="font-family:Tahoma;font-size:10px"><b>State :</b></font></td>
<td><font style="font-family:Tahoma;font-size:10px">'.$response["ship_state"].'</font></td>
</tr>
<tr>
<td> <font style="font-family:Tahoma;font-size:10px"><b>Country :</b></font></td>
<td><font style="font-family:Tahoma;font-size:10px">'.$response["ship_country"].'</font></td>
</tr>
<tr>
<td> <font style="font-family:Tahoma;font-size:10px"><b>Zip :</b></font></td>
<td><font style="font-family:Tahoma;font-size:10px">'.$response["ship_zipcode"].'</font></td>
</tr>
<tr>
<td> <font style="font-family:Tahoma;font-size:10px"><b>Phone :</b></font></td>
<td><font style="font-family:Tahoma;font-size:10px">'.$response["telephone"].'</font></td>
</tr>
<tr>
<td> <font style="font-family:Tahoma;font-size:10px"><b>Email :</b></font></td>
<td><font style="font-family:Tahoma;font-size:10px"><a target="_blank" href="mailto:'.$response["email"].'">'.$response["email"].'</a></font></td>
</tr>
<tr>
<td> <font style="font-family:Tahoma;font-size:10px"><b>Courier :</b></font></td>
<td><font style="font-family:Tahoma;font-size:10px">'.$response["courier"].'</font></td>
</tr>
</tbody>
</table>
<br>
<table cellspacing="0" cellpadding="2" width="630" border="0">
<tbody><tr>
<td background="images/newsletter/bar_bg.jpg" align="center"><font color="#a1a1a1" style="font-family:Tahoma;font-size:11px"><b>Thumb</b></font></td>
<td background="images/newsletter/bar_bg.jpg" align="center"><font color="#a1a1a1" style="font-family:Tahoma;font-size:11px"><b>Item</b></font></td>
<td background="images/newsletter/bar_bg.jpg" align="center"><font color="#a1a1a1" style="font-family:Tahoma;font-size:11px"><b>Style Number</b></font></td>
<td background="images/newsletter/bar_bg.jpg" align="center"><font color="#a1a1a1" style="font-family:Tahoma;font-size:11px"><b>Size</b></font></td>
<td background="images/newsletter/bar_bg.jpg" align="center"><font color="#a1a1a1" style="font-family:Tahoma;font-size:11px"><b>Color</b></font></td>
<td background="images/newsletter/bar_bg.jpg" align="center"><font color="#a1a1a1" style="font-family:Tahoma;font-size:11px"><b>Quantity</b></font></td>
<td background="images/newsletter/bar_bg.jpg" align="center"><font color="#a1a1a1" style="font-family:Tahoma;font-size:11px"><b>Price</b></font></td>
<td background="images/newsletter/bar_bg.jpg" align="center"><font color="#a1a1a1" style="font-family:Tahoma;font-size:11px"><b>Subtotal</b></font></td>
</tr>
'.$ordermsg.'
<tr>
<td align="right" colspan="7"><font style="font-family:Tahoma;font-size:12px">Grand-Total : </font></td>
<td align="right"><font style="font-family:Tahoma;font-size:12px">$'.$grandtotal.'</font></td>
</tr>
<tr>
<td align="right" colspan="7"><font style="font-family:Tahoma;font-size:9px">( For countries other than United State, you will be contacted by customer service for shipping fees ) </font></td>
<td align="center"></td>
</tr>
<tr>
<td align="center" colspan="8"><font style="color:red;font-family:Tahoma;font-size:9px"><br><br>* NOTE: Your order was received and will ship according to the availability notice on product page. </font><br></td>
</tr>
</tbody></table>
<table width="630" align="center" style="border-top:1px solid black">
<tbody><tr>
<td width="630" align="center">
<font color="#333333" style="font-family:Tahoma;font-size:10px">
<span class="il">Instyle</span> <span class="il">New</span> <span class="il">York</span>
230 West 38th Street
<span class="il">New</span> <span class="il">York</span>, NY 10018
PHONE: [phone] ext 22 EMAIL <a target="_blank" href="mailto:vamsi#gmail.com">info#<span class="il">company</span>.com</a>
</font>
</td>
</tr>
<tr>
<td width="630" align="center">
<font color="#333333" style="font-family:Tahoma;font-size:10px">
Purchaser agrees to abide by the <a target="_blank" href="#"><span class="il">company</span>.com</a> return policy.
</font>
</td>
</tr>
</tbody></table>
</font>
</td>
<td bgcolor="#efefef"> </td>
</tr>
<tr>
<td><img src="images/newsletter/bottom_left.jpg" class="CToWUd"></td>
<td><img src="images/newsletter/bottom_bg.jpg" class="CToWUd"></td>
<td><img src="images/newsletter/bottom_right.jpg" class="CToWUd"></td>
</tr>
</tbody>
</table>
<br><br>
</td></tr>
</tbody>
</table>';
mail($to,$subject,$message,$headers);
The email in outlook getting the same html code of $message with containing order details..
Thanks

Answer 1

If your code doesn't contain a valid <!doctype html> declaration and <body> tags etc, then that could contribute to the problem.
People using Outlook (or other similar mail clients) may have their settings set to not display HTML and images. I have seen that happen quite often before.
This stands at being a local issue and you have no control over that.
Therefore, you need to include a seperate header as TEXT only which is the usual norm when sending mail.
Use Phpmailer or Swiftmailer. That should solve everything.
References:
https://github.com/PHPMailer/PHPMailer
http://phpmailer.worxware.com/
http://swiftmailer.org/
and read the documentation on its implementation.
Other options are to use services such as MailChimp, Constant Contact etc. which work well and are services that are used widely and are already setup to handle both HTML and plain text formats.
http://mailchimp.com/
http://www.constantcontact.com/