title: Custom post-request with RESTAdapter
body: <p>My models work with the server via Ember's default <code>RESTAdapter</code>.</p>
  
  <p>I just created a custom endpoint <code>/mail</code> on my server which sends an e-mail if provided a name, valid e-mail-adress and text.</p>
  
  <p>How do I make Ember send that custom post-request? Is it possible without Ember.ajax at all?</p>