title: Send Mailchimp newsletter to List via PHP
body: <p>Is there a way to send a self-designed HTML and CSS email to a Mailchimp List from a .php page? I want to integrate a newsletter function to an admin panel with my own newsletter template and send it from there.</p>
  
  <p>I don't wanna have to log in to Mailchimp every time I wanna send an email, especially since the template will be the same each and every time.</p>