diff --git a/lib/redmine/imap.rb b/lib/redmine/imap.rb
index d09832c2e..aceb75cb2 100644
--- a/lib/redmine/imap.rb
+++ b/lib/redmine/imap.rb
@@ -30,14 +30,22 @@ module Redmine
         imap.login(imap_options[:username], imap_options[:password]) unless imap_options[:username].nil?
         imap.select(folder)
         imap.search(['ALL']).each do |message_id|
-          puts "Receiving message #{message_id}"
           msg = imap.fetch(message_id,'RFC822')[0].attr['RFC822']
+          logger.debug "Receiving message #{message_id}" if logger && logger.debug?
           if MailHandler.receive(msg, options)
-            imap.store(message_id, "+FLAGS", [:Deleted])
+            imap.store(message_id, "+FLAGS", [:Seen, :Deleted])
+          else
+            imap.store(message_id, "+FLAGS", [:Seen])
           end
         end
         imap.expunge
       end
+      
+      private
+      
+      def logger
+        RAILS_DEFAULT_LOGGER
+      end
     end
   end
 end