Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965410AbWJBVdy (ORCPT ); Mon, 2 Oct 2006 17:33:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965411AbWJBVdy (ORCPT ); Mon, 2 Oct 2006 17:33:54 -0400 Received: from inti.inf.utfsm.cl ([200.1.21.155]:27361 "EHLO inti.inf.utfsm.cl") by vger.kernel.org with ESMTP id S965410AbWJBVdx (ORCPT ); Mon, 2 Oct 2006 17:33:53 -0400 Message-Id: <200610022133.k92LXO5d020760@laptop13.inf.utfsm.cl> To: Linus Torvalds cc: "Martin J. Bligh" , Lee Revell , Matti Aarnio , linux-kernel Subject: Re: Spam, bogofilter, etc In-Reply-To: Message from Linus Torvalds of "Mon, 02 Oct 2006 09:40:42 MST." X-Mailer: MH-E 7.4.2; nmh 1.1; XEmacs 21.5 (beta27) Date: Mon, 02 Oct 2006 17:33:24 -0400 From: "Horst H. von Brand" X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0.2 (inti.inf.utfsm.cl [200.1.21.155]); Mon, 02 Oct 2006 17:33:24 -0400 (CLT) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1778 Lines: 39 Linus Torvalds wrote: [...] > If you want a yes/no kind of thing, do it on real hard issues, like not > accepting email from machines that aren't registered MX gateways. Sure, > that will mean that people who just set up their local sendmail thing and > connect directly to port 25 will just not be able to email, but let's face > it, that's why we have ISP's and DNS in the first place. Larger sites have ingoing (MX) machines and outgoing (no MX) ones... this is useless. And the whole SPF fiasco shows that such mechanisms (DNS based, remote site publishes the data) are even easier to bypass (I've seen statistics showing that the overwhelming mayority of SPF-"protected" email is spam). What does work rather well is greylisting (on first try tell them to come back later, spammers rarely retry their junk). Add blacklists (sadly, there are few reliable ones, AFAICS) and you cut it down even more. And yes, there is no silver bullet. This is an arms race, get a new anti-spam device (filter configuration, ...) and soon they will figure out how to bypass it. In any case, I've seen claims that around 80% of email now is spam. That it is still only a little in LKML says that the listmasters are doing an oustanding job. -- Dr. Horst H. von Brand User #22616 counter.li.org Departamento de Informatica Fono: +56 32 2654431 Universidad Tecnica Federico Santa Maria +56 32 2654239 Casilla 110-V, Valparaiso, Chile Fax: +56 32 2797513 - 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/