+#ifdef EAI_NODATA
+ /* EAI_NODATA was in the older RFC-2553, but that got
+ * obsoleted by RFC-3493 - there, EAI_NODATA is no longer
+ * valid, and modern operating systems no longer issue this
+ * error code. libesmtp/getaddrinfo.?, however, still does.
+ * (This was reported to Brian Stafford 2013-02-03.)
+ */
+ case EAI_NODATA: /* specified host is unknown */
+#endif