title: Inserting tracking pixel into html email newsletter
body: <p>I am working on a new email template for our marketing, the ad agency have asked for us to insert a tracking pixel.</p>
  
  <p>How would I go about inserting a tracking pixel into our email marketing template? </p>
  
  <p>The tracking pixel is a snippet of javascript which doesn't have any effects to the styling of the email. Would this code simply be places into the head tag? </p>
  
  <p>Or is it more to it than that? If it can't go in the head tag, how can the performance of the email be tracked by our ad agency? </p>