title: Regex to get a guid from a email reply
body: <p>Trying to figure out the Regex pattern to match if an email contains a Guid, e.g.</p>
  
  <blockquote>
    <p>a141aa94-3bec-4b68-b562-6b05fc2bfa48-reply@site.com</p>
  </blockquote>
  
  <p>The Guid could potentially be anywhere before the @, e.g.</p>
  
  <blockquote>
    <p>reply-a141aa94-3bec-4b68-b562-6b05fc2bfa48@wingertdesign.com</p>
  </blockquote>