--- app/models/mailer.rb.orig2	2008-03-11 11:44:50.000000000 +0100
+++ app/models/mailer.rb	2008-03-11 11:48:57.000000000 +0100
@@ -131,6 +131,8 @@
   
   # Overrides the create_mail method
   def create_mail
+    # identify Redmine emails easily
+    headers 'X-Redmine-site' => Setting.app_title
     # Removes the current user from the recipients and cc
     # if he doesn't want to receive notifications about what he does
     if User.current.pref[:no_self_notified]