diff -urN postfix-2.6-20080123.orig/conf/post-install postfix-2.6-20080123/conf/post-install
--- postfix-2.6-20080123.orig/conf/post-install	2007-12-04 06:08:16.000000000 +0900
+++ postfix-2.6-20080123/conf/post-install	2008-01-25 12:09:57.000000000 +0900
@@ -303,7 +303,7 @@
 
 test -f $config_directory/main.cf && {
     for name in daemon_directory command_directory queue_directory mail_owner \
-        setgid_group sendmail_path newaliases_path mailq_path \
+        setgid_group sendmail_path newaliases_path mailq_path data_directory \
 	html_directory manpage_directory sample_directory readme_directory
     do
 	eval junk=\$$name