docs: def get_raw_email(self):
          """
          This only applies to raw payloads:
          https://sendgrid.com/docs/Classroom/Basics/Inbound_Parse_Webhook/setting_up_the_inbound_parse_webhook.html#-Raw-Parameters
          """
          if 'email' in self.payload:
              raw_email = email.message_from_string(self.payload['email'])
              return raw_email
          else:
              return None