title: Is it safe to remove header CSS rules from inlined HTML email?
body: <p>I am using <a href="https://templates.mailchimp.com/resources/inline-css/" rel="nofollow noreferrer">Mailchimp's CSS inliner tool</a> to make all my CSS inline for a HTML email. But it doesn't remove the style rules in the header.</p>
  
  <p>The same thing applies with <a href="https://htmlemail.io/inline/" rel="nofollow noreferrer">HTMLemail.io inliner</a>. The header CSS is still there.</p>
  
  <p>Is it not safe to remove CSS rules from the header after inlining them? </p>