#define ERRNO_DATA4XX (-46) /* DATA gave 4xx error */
#define ERRNO_PROXYFAIL (-47) /* Negotiation failed for proxy configured host */
#define ERRNO_AUTHPROB (-48) /* Authenticator "other" failure */
-
-#ifdef SUPPORT_I18N
-# define ERRNO_UTF8_FWD (-49) /* target not supporting SMTPUTF8 */
-#endif
- /* -50 free for re-use */
+#define ERRNO_UTF8_FWD (-49) /* target not supporting SMTPUTF8 */
+#define ERRNO_HOST_IS_LOCAL (-50) /* Transport refuses to talk to localhost */
/* These must be last, so all retry deferments can easily be identified */