--- conf/post-install.orig	2011-10-11 20:39:19.000000000 -0400
+++ conf/post-install	2011-10-11 20:41:58.000000000 -0400
@@ -790,18 +790,6 @@
 EOF
     }
 
-    # Postfix 2.9.
-    # Safety net for incompatible changes in IPv6 defaults.  This
-    # requires that the default is "inet_protocols = ipv4" when
-    # IPv6 support is not compiled in. See util/sys_defs.h.
-
-    test "`$POSTCONF -dh inet_protocols`" = "ipv4" ||
-	test -n "`$POSTCONF -c $config_directory -nh inet_protocols`" || {
-	echo COMPATIBILITY: editing main.cf, setting inet_protocols=ipv4.
-	echo Specify inet_protocols explicitly if you want to enable IPv6.
-	echo In a future release IPv6 will be enabled by default.
-	$POSTCONF -c $config_directory inet_protocols=ipv4 || exit 1
-    }
 }
 
 # A reminder if this is the first time Postfix is being installed.