title: cakephp How to change the X-Mailer
body: <p>Using cakePHP version 2.3.8, </p>
  
  <p>I am trying to change the X-Mailer: CakePHP Email into X-Mailer: PHP mail. 
  I have tried this in the controller and in the /app/Config/email.php in my 'default' settings.</p>
  
  <pre><code> 'X-Mailer' =&gt; 'PHP mail',
  </code></pre>
  
  <p>But not able to get it changed, really frustrating.</p>