Update upstream cookbooks

cookbooks/postfix/templates/default/aliases.erb

@@ -1,11 +1,10 @@
 #
-# This file is generated by Chef for <%= node['fqdn'] %>
-#
-# Local changes will be overwritten
+# Auto-generated by Chef.
+# Local modifications will be overwritten.
 #
 # See man 5 aliases for format
 postmaster:    root
 
 <% node['postfix']['aliases'].each do |name, value| %>
-<%= name %>: <%= [value].flatten.map{|x| %Q("#{x}")}.join(', ') %>
+<%= name %>: <%= [value].flatten.map{|x| if (x.include?("@")) then x else %Q("#{x}") end}.join(', ') %>
 <% end unless node['postfix']['aliases'].nil? %>