$OpenBSD: patch-conf_main_cf,v 1.4 2015/10/19 19:38:10 giovanni Exp $
--- conf/main.cf.orig	Wed Apr  1 12:56:39 2015
+++ conf/main.cf	Thu Oct 15 15:08:06 2015
@@ -28,6 +28,7 @@
 # The level below is what should be used with new (not upgrade) installs.
 #
 compatibility_level = 2
+smtputf8_enable = no
 
 # SOFT BOUNCE
 #
@@ -133,6 +134,9 @@ mail_owner = postfix
 #inet_interfaces = $myhostname
 #inet_interfaces = $myhostname, localhost
 
+# OpenBSD is IPv6-capable - use all available address families.
+inet_protocols = all
+
 # The proxy_interfaces parameter specifies the network interface
 # addresses that this mail system receives mail on by way of a
 # proxy or network address translation unit. This setting extends
@@ -673,4 +677,3 @@ sample_directory =
 # readme_directory: The location of the Postfix README files.
 #
 readme_directory =
-inet_protocols = ipv4
