#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 */
/* These must be last, so all retry deferments can easily be identified */