diff --git a/.kitchen.dokken.yml b/.kitchen.dokken.yml
index b2c88e5..53963e3 100644
--- a/.kitchen.dokken.yml
+++ b/.kitchen.dokken.yml
@@ -90,6 +90,9 @@ suites:
 - name: server
   run_list:
   - recipe[postfix::server]
+  attributes:
+    postfix:
+      use_relay_restrictions_maps: "yes"
 
 - name: sasl_auth
   run_list:
diff --git a/recipes/_attributes.rb b/recipes/_attributes.rb
index f3ffe6e..d8f2535 100644
--- a/recipes/_attributes.rb
+++ b/recipes/_attributes.rb
@@ -59,7 +59,7 @@ if node['postfix']['use_virtual_aliases_domains']
 end
 
 if node['postfix']['use_relay_restrictions_maps']
-  default['postfix']['main']['smtpd_relay_restrictions'] = "hash:#{node['postfix']['relay_restrictions_db']}, reject"
+  node.default_unless['postfix']['main']['smtpd_relay_restrictions'] = "hash:#{node['postfix']['relay_restrictions_db']}, reject"
 end
 
 if node['postfix']['master']['maildrop']['active']