deliver

# File actionmailer/lib/action_mailer/structured_event_subscriber.rb, line 8
    def deliver(event)
      exception = event.payload[:exception_object]
      payload = {
        message_id: event.payload[:message_id],
        duration_ms: event.duration.round(2),
        mail: event.payload[:mail],
        perform_deliveries: event.payload[:perform_deliveries],
      }

      if exception
        payload[:exception_class] = exception.class.name
        payload[:exception_message] = exception.message
      end

      emit_debug_event("action_mailer.delivered", payload)
    end