for now disable the option to enable encryption

app/controllers/application_controller.rb

@@ -36,7 +36,7 @@ class ApplicationController < ActionController::Base
   helper_method :admin?
 
   def feature_toggle?(feature)
-    false
+    (Config['features'] || []).include?(feature)
   end
   helper_method :feature_toggle?
 

app/views/welcome/index.html.erb

@@ -17,9 +17,11 @@
       </li>
     <% end %>
   <% else %>
+    <% if feature_toggle?('enable_mail_crypt') %>
     <li><%= link_to (t :mail_crypt_settings) , mail_crypt_path %> (beta)
     <br /><%= t(:enable_mail_crypt_short_help) %>
     </li>
+    <% end %>
   <% end %>
   <li style='padding-top:10px'><%= link_to (t :delete_account) ,  delete_account_path %>
   </li>