+#ifdef EXPERIMENTAL_TPDA
+int tpda_defer_errno = 0;
+uschar *tpda_defer_errstr = NULL;
+uschar *tpda_delivery_ip = NULL;
+int tpda_delivery_port = 0;
+uschar *tpda_delivery_fqdn = NULL;
+uschar *tpda_delivery_local_part= NULL;
+uschar *tpda_delivery_domain = NULL;
+uschar *tpda_delivery_confirmation = NULL;
+#endif
+