docs: def send_mail(self, sender, subject, recipients, message, response_id=None, html_message=False):
          """Send an email using EBUio features. If response_id is set, replies will be send back to the PlugIt server."""
  
          params = {
              'sender': sender,
              'subject': subject,
              'dests': recipients,
              'message': message,
              'html_message': html_message,
          }
  
          if response_id:
              params['response_id'] = response_id
  
          return self._request('mail/', postParams=params, verb='POST')