#define ERRNO_MAIL4XX (-45) /* MAIL gave 4xx error */
#define ERRNO_DATA4XX (-46) /* DATA gave 4xx error */
#define ERRNO_PROXYFAIL (-47) /* Negotiation failed for proxy configured host */
-#define ERRNO_AUTHPROB (-48) /* Autheticator "other" failure */
+#define ERRNO_AUTHPROB (-48) /* Authenticator "other" failure */
+
+#ifdef EXPERIMENTAL_INTERNATIONAL
+# define ERRNO_UTF8_FWD (-49) /* target not supporting SMTPUTF8 */
+#endif
/* These must be last, so all retry deferments can easily be identified */