#ifdef SUPPORT_DANE
uschar *hosts_try_dane;
uschar *hosts_require_dane;
+ uschar *dane_require_tls_ciphers;
#endif
uschar *hosts_try_fastopen;
#ifndef DISABLE_PRDR
#ifndef DISABLE_DKIM
struct ob_dkim dkim;
#endif
+#ifdef EXPERIMENTAL_ARC
+ uschar *arc_sign;
+#endif
} smtp_transport_options_block;
/* smtp connect context */