title: <tr>-borders doesn't appear in outlook
body: <p>I am having some trouble with my HTML tables in Outlook 2007+.
  All borders on my <code>&lt;tr&gt;</code>-elements are not showing up!</p>
  
  <p>During development, I use html-files and .css-files. I then use a tool to merge the two together.</p>
  
  <p>when merged, Chrome opens the html-file like this:
  <img src="https://i.stack.imgur.com/isnjj.png" alt="table working in chrome"></p>
  
  <p>However, when I send the mail as an html-mail, Outlook displays it like this:
  <img src="https://i.stack.imgur.com/rJJaT.png" alt="table not working in outlook 2007+"></p>
  
  <p>After merging, all my <code>&lt;tr&gt;</code>-elements look like this:</p>
  
  <pre><code>&lt;tr style="border-bottom: 1px solid #caecf0;"&gt;&lt;/td&gt;
  </code></pre>
  
  <p>Do any of you know why?</p>
  
  <hr>
  
  <p>Also, if anyone knows why the table footer is bigger than the header (they have the exact same styling) in outlook, please let me know ;-)</p>