$NetBSD: patch-af,v 1.11 2007/04/26 06:26:27 jnemeth Exp $

--- sendmail/conf.c.orig	2007-04-03 14:32:29.000000000 -0700
+++ sendmail/conf.c
@@ -4393,7 +4393,8 @@ sm_gethostbyaddr(addr, len, type)
 
 #if NETINET6
 	if (type == AF_INET6 &&
-	    IN6_IS_ADDR_UNSPECIFIED((struct in6_addr *) addr))
+	    (IN6_IS_ADDR_UNSPECIFIED((struct in6_addr *) addr) ||
+	    IN6_IS_ADDR_LINKLOCAL((struct in6_addr *) addr)))
 	{
 		/* Avoid reverse lookup for IPv6 unspecified address */
 		SM_SET_H_ERRNO(HOST_NOT_FOUND);