into big_buffer_size and in some circumstances increased. It should be at least
as long as the maximum path length. */
-#if defined PATH_MAX && PATH_MAX > 16384
+#ifdef AUTH_HEIMDAL_GSSAPI
+ /* RFC 4121 section 5.2, SHOULD support 64K input buffers */
+# define __BIG_BUFFER_SIZE 65536
+#else
+# define __BIG_BUFFER_SIZE 16384
+#endif
+
+#if defined PATH_MAX && PATH_MAX > __BIG_BUFFER_SIZE
# define BIG_BUFFER_SIZE PATH_MAX
-#elif defined MAXPATHLEN && MAXPATHLEN > 16384
+#elif defined MAXPATHLEN && MAXPATHLEN > __BIG_BUFFER_SIZE
# define BIG_BUFFER_SIZE MAXPATHLEN
#else
-# define BIG_BUFFER_SIZE 16384
+# define BIG_BUFFER_SIZE __BIG_BUFFER_SIZE
#endif
/* header size of pipe content
#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 */