diff --git a/recipes/default.rb b/recipes/default.rb
index eb0a0c6..ca20be4 100644
--- a/recipes/default.rb
+++ b/recipes/default.rb
@@ -72,12 +72,18 @@ when 'omnios'
   end
 end
 
+execute 'update-postfix-sender_canonical' do
+  command "postmap #{node['postfix']['conf_dir']}/sender_canonical"
+  action :nothing
+end
+
 if !node['postfix']['sender_canonical_map_entries'].empty?
   template "#{node['postfix']['conf_dir']}/sender_canonical" do
     owner 'root'
     group 0
     mode  '0644'
-    notifies :restart, 'service[postfix]'
+    notifies :run, 'execute[update-postfix-sender_canonical]'
+    notifies :reload, 'service[postfix]'
   end
 
   if !node['postfix']['main'].key?('sender_canonical_maps')
diff --git a/templates/default/sender_canonical.erb b/templates/default/sender_canonical.erb
new file mode 100644
index 0000000..785a1c3
--- /dev/null
+++ b/templates/default/sender_canonical.erb
@@ -0,0 +1,10 @@
+#
+# This file is generated by Chef for <%= node['fqdn'] %>
+#
+# Local changes will be overwritten
+#
+# See man 5 canonical for format
+
+<% node['postfix']['sender_canonical_map_entries'].each do |name, value| %>
+<%= name %> <%= value %>
+<% end unless node['postfix']['sender_canonical_map_entries'].nil? %>