#ifdef SUPPORT_I18N
# define ERRNO_UTF8_FWD (-49) /* target not supporting SMTPUTF8 */
#endif
+#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
+# define ERRNO_REQUIRETLS (-50) /* REQUIRETLS session not started */
+#endif
/* These must be last, so all retry deferments can easily be identified */
#define OPTION_PIPE BIT(5)
#define OPTION_SIZE BIT(6)
#define OPTION_CHUNKING BIT(7)
+#define OPTION_REQUIRETLS BIT(8)
+
+/* Codes for tls_requiretls requests (usually by sender) */
+
+#define REQUIRETLS_MSG BIT(0) /* REQUIRETLS onward use */
/* Argument for *_getc */