code: def classic_email_send(self, subject, from_address, to, consent_to_track, client_id=None, cc=None, bcc=None, html=None, text=None, attachments=None, track_opens=True, track_clicks=True, inline_css=True, group=None, add_recipients_to_list=None):
          
          validate_consent_to_track(consent_to_track)
          body = {
              "Subject": subject,
              "From": from_address,
              "To": to,
              "CC": cc,
              "BCC": bcc,
              "HTML": html,
              "Text": text,
              "Attachments": attachments,
              "TrackOpens": track_opens,
              "TrackClicks": track_clicks,
              "InlineCSS": inline_css,
              "Group": group,
              "AddRecipientsToList": add_recipients_to_list,
              "ConsentToTrack": consent_to_track,
          }
          if client_id is None:
              response = self._post(
                  "/transactional/classicEmail/send", json.dumps(body))
          else:
              response = self._post(
                  "/transactional/classicEmail/send?clientID=%s" % client_id, json.dumps(body))
          return json_to_py(response)
docs: Sends a classic email.