code: def send_email_notification(self, notification_id=None, include_traceback=False, verbosity=1):
          
          # Load email notification settings if available
          if notification_id is not None:
              try:
                  email_settings = settings.EMAIL_NOTIFICATIONS.get(notification_id, {})
              except AttributeError:
                  email_settings = {}
          else:
              email_settings = {}
  
          # Exit if no traceback found and not in 'notify always' mode
          if not include_traceback and not email_settings.get('notification_level', 0):
              print(self.style.ERROR("Exiting, not in 'notify always' mode."))
              return
  
          # Set email fields.
          subject = email_settings.get('subject', "Django extensions email notification.")
  
          command_name = self.__module__.split('.')[-1]
  
          body = email_settings.get(
              'body',
              "Reporting execution of command: '%s'" % command_name
          )
  
          # Include traceback
          if include_traceback and not email_settings.get('no_traceback', False):
              try:
                  exc_type, exc_value, exc_traceback = sys.exc_info()
                  trb = ''.join(traceback.format_tb(exc_traceback))
                  body += "\n\nTraceback:\n\n%s\n" % trb
              finally:
                  del exc_traceback
  
          # Set from address
          from_email = email_settings.get('from_email', settings.DEFAULT_FROM_EMAIL)
  
          # Calculate recipients
          recipients = list(email_settings.get('recipients', []))
  
          if not email_settings.get('no_admins', False):
              recipients.extend(settings.ADMINS)
  
          if not recipients:
              if verbosity > 0:
                  print(self.style.ERROR("No email recipients available."))
              return
  
          # Send email...
          send_mail(subject, body, from_email, recipients,
                    fail_silently=email_settings.get('fail_silently', True))
docs: Send email notifications.
  
          Reads settings from settings.EMAIL_NOTIFICATIONS dict, if available,
          using ``notification_id`` as a key or else provides reasonable
          defaults.