+ return_path = sender_address = NULL;
+ authenticated_sender = NULL;
+ sending_ip_address = NULL;
+ deliver_host_address = deliver_host =
+ deliver_domain_orig = deliver_localpart_orig = NULL;
+ dnslist_domain = dnslist_matched = NULL;
+#ifndef DISABLE_DKIM
+ dkim_cur_signer = NULL;
+#endif