title: Email showing up blank in Outlook and Hotmail
body: <p>For some reason emails sent to Hotmail or viewed on Microsoft Outlook always show up blank and as far as I know, fine on others (no one else complained except from people who use Hotmail and Outlook).</p>
  
  <p>I use CodeIgniter, here is the setting for the email:</p>
  
  <pre><code>$config['mailtype'] = "html";
  $config['charset'] = "utf-8";
  $config['newline'] = "\r\n";
  $config['crlf'] = "\r\n";
  </code></pre>
  
  <p>And this is what the email template looks like:</p>
  
  <pre><code>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt;
  &lt;html&gt;
      &lt;head&gt;&lt;title&gt;Welcome to &lt;?php echo $site_name; ?&gt;!&lt;/title&gt;&lt;/head&gt;
      &lt;body&gt;
          &lt;div style="max-width: 800px; margin: 0; padding: 30px 0;"&gt;
              &lt;table width="80%" border="0" cellpadding="0" cellspacing="0"&gt;
                  &lt;tr&gt;
                      &lt;td width="5%"&gt;&lt;/td&gt;
                      &lt;td align="left" width="95%" style="font: 13px/18px Arial, Helvetica, sans-serif;"&gt;
                          &lt;img src="&lt;?php echo base_url(); ?&gt;/media/images/logo.png" alt="Logo" /&gt;
                          &lt;br /&gt;&lt;br /&gt;
                          &lt;h2 style="font: normal 20px/23px Arial, Helvetica, sans-serif; margin: 0; padding: 0 0 18px; color: black;"&gt;Welcome to &lt;?php echo $site_name; ?&gt;!&lt;/h2&gt;
                          Thanks for joining &lt;?php echo $site_name; ?&gt;. We listed your sign in details below, make sure you keep them safe.&lt;br /&gt;
                          To verify your email address, please follow this link:&lt;br /&gt;
                          &lt;br /&gt;
                          &lt;big style="font: 16px/18px Arial, Helvetica, sans-serif;"&gt;&lt;b&gt;&lt;a href="&lt;?php echo site_url('/activate/'.$user_id.'/'.$new_email_key.'/'.$newsletter); ?&gt;" style="color: #3366cc;"&gt;Finish your registration...&lt;/a&gt;&lt;/b&gt;&lt;/big&gt;&lt;br /&gt;&lt;br /&gt;
                          Link doesn't work? Copy the following link to your browser address bar&lt;br /&gt;
                          &lt;nobr&gt;&lt;a href="&lt;?php echo site_url('/activate/'.$user_id.'/'.$new_email_key.'/'.$newsletter); ?&gt;" style="color: #3366cc;"&gt;&lt;?php echo site_url('/activate/'.$user_id.'/'.$new_email_key.'/'.$newsletter); ?&gt;&lt;/a&gt;&lt;/nobr&gt;&lt;br /&gt;
                          &lt;br /&gt;
                          Please verify your email within &lt;?php echo $activation_period; ?&gt; hours, otherwise your registration will become invalid and you will have to register again.&lt;br /&gt;
                          &lt;br /&gt;
                          &lt;br /&gt;
                          Please note that this is an automated message, do not respond to this email. If you have any questions, please don't hesitate to &lt;a href="&lt;?php echo base_url(); ?&gt;contact-us"&gt;contact us here&lt;/a&gt;.
                          &lt;br /&gt;
                          &lt;br /&gt;
                          Have fun!&lt;br /&gt;
                          The &lt;?php echo $site_name; ?&gt; Team
                      &lt;/td&gt;
                  &lt;/tr&gt;
              &lt;/table&gt;
          &lt;/div&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Is there something I am missing to make this work in Outlook and Hotmail?  Thanks!</p>