title: Rails 4 x premailer x SASS: import stylesheet in mailer view
body: <p>In my Rails 4 app, I use mailers to send out emails to users.</p>
  
  <p>These mailers are working fine.</p>
  
  <p>Now, I would like to style them, so I installed the <a href="https://github.com/fphilipe/premailer-rails" rel="nofollow">premailer-rails</a> gem (and the <a href="https://github.com/sparklemotion/nokogiri" rel="nofollow">nokogiri</a> gem).</p>
  
  <p>I restarted my server.</p>
  
  <p>Then, I created a specific stylesheet for mailers: <code>public/assets/mailers.scss</code></p>
  
  <p>I my mailer view, I added:</p>
  
  <pre><code>&lt;head&gt;
    &lt;% stylesheet_link_tag mailers "public/assets/mailers.scss" %&gt;
  &lt;/head&gt;
  </code></pre>
  
  <p>However, when a user opens the email in his inbox, for instance Gmail, the style is not applied.</p>
  
  <p>Is there a particular way to include stylesheets in mailer views in Rails with premailer when using SASS?</p>