:notice_email_sent requires 2 paramters (To: being the second) (plugin tends to override this

by its own notice_ messages, but probably core definition will prevail.

app/controllers/dmsf_controller.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Redmine plugin for Document Management System "Features"
 #
 # Copyright (C) 2011   Vít Jonáš <vit.jonas@gmail.com>
@@ -75,7 +76,7 @@ class DmsfController < ApplicationController
     DmsfMailer.send_documents(User.current, @email_params["to"], @email_params["cc"],
       @email_params["subject"], @email_params["zipped_content"], @email_params["body"]).deliver
     File.delete(@email_params["zipped_content"])
-    flash[:notice] = l(:notice_email_sent)
+    flash[:notice] = l(:notice_email_sent, @email_params["to"])
     redirect_to({:controller => "dmsf", :action => "show", :id => @project, :folder_id => @folder})
   end