anchor.diff:    <%= text_field_tag :to, '', :placeholder => 'Send this email to me@yourcompany.com' %>
     <button type="submit">Send</button>
   <% end %>
  -<h2>Message Headers</h2>
  -<pre class='headers'>
  -<%= @mail.header_fields.collect { |header| "#{header.name}:   #{header.decoded}\n"}%>
  -</pre>
  +<h2>Headers</h2>
  +<div class="headers">
  +<% @mail.header_fields.each do |header| %>
  + <dl>
  +   <dt><%= header.name %></dt>
  +   <dd><%= header.decoded %></dd>
  + </dl>
  +<% end %>
  +</div>
   <!--
   <h3>Debug output</h3>
   <pre>
  
positive.code: </pre>
  -->
  
  <h2>Message Content</h2>
  <% parts = @mail.multipart? ? @mail.parts : [@mail] %>
  <% parts.each do |part| %>
    <h3 class="content_type"><%= part.content_type %></h3>
  
negative.code:   .headers {
      color: #333;
    }
    .headers dl {
      margin: 0;
      padding: 0;
      clear: both;
    }
    .headers dt {
      width: 100px;
      padding: 1px;
      float: left;
      text-align: right;
      font-weight: bold;
      color: #7f7f7f;
    }
    .headers dd {
      margin-left: 110px;
      padding: 1px;
    }
  
    .deliver_form {
      margin-bottom: 0;
      float: right;
  