+#ifdef EXPERIMENTAL_DOMAINKEYS
+extern uschar *dk_signing_domain; /* Domain used for signing a message. */
+extern uschar *dk_signing_selector; /* Selector used for signing a message. */
+extern int dk_do_verify; /* DK verification switch. Set with ACL control statement. */
+#endif
+
+#ifdef EXPERIMENTAL_DKIM
+extern uschar *dkim_signing_domain; /* Domain used for signing a message. */
+extern uschar *dkim_signing_selector; /* Selector used for signing a message. */
+extern int dkim_do_verify; /* DKIM verification switch. Set with ACL control statement. */
+#endif
+