Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932569AbWLLX6K (ORCPT ); Tue, 12 Dec 2006 18:58:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932567AbWLLX6K (ORCPT ); Tue, 12 Dec 2006 18:58:10 -0500 Received: from z2.cat.iki.fi ([212.16.98.133]:59953 "EHLO z2.cat.iki.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932569AbWLLX6J (ORCPT ); Tue, 12 Dec 2006 18:58:09 -0500 X-Greylist: delayed 432 seconds by postgrey-1.27 at vger.kernel.org; Tue, 12 Dec 2006 18:58:09 EST Date: Wed, 13 Dec 2006 01:50:56 +0200 From: Matti Aarnio To: linux-kernel@vger.kernel.org Subject: Postgrey experiment at VGER Message-ID: <20061212235056.GP10054@mea-ext.zmailer.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 907 Lines: 21 Hello, I am running an experiment with Postgrey to delay (for 300 seconds minimum) incoming emails. If the clients don't retry after this delay, then the messages don't usually get in. The "postgrey" in question is the very same thing that exists for the Postfix MTA with various automatic whitelistings of repeatedly successfull senders, etc. I do already see spammers smart enough to retry addresses from the zombie machine, but that share is now below 10% of all emails. My prediction for next 200 days is that most spammers get the clue, but it gives us perhaps 3 months of less leaked junk. /Matti Aarnio -- one of - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/