From owner-freebsd-security@FreeBSD.ORG Fri May 14 06:13:01 2004 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 31C8E16A4CE for ; Fri, 14 May 2004 06:13:01 -0700 (PDT) Received: from relay2.mecon.ar (relay2.mecon.gov.ar [168.101.16.11]) by mx1.FreeBSD.org (Postfix) with ESMTP id 96B6D43D3F for ; Fri, 14 May 2004 06:12:59 -0700 (PDT) (envelope-from fernando@mecon.gov.ar) Received: from racing.mecon.ar (racing.mecon.gov.ar [168.101.133.15]) by relay2.mecon.ar (8.12.8p2/8.12.8) with ESMTP id i4EDCn5L081008; Fri, 14 May 2004 10:12:49 -0300 (ART) (envelope-from fernando@mecon.gov.ar) Received: from racing.mecon.ar (meyosp.mecon.gov.ar [10.11.0.149]) by racing.mecon.ar (8.12.8p2/8.12.8) with ESMTP id i4EDCnrl043612; Fri, 14 May 2004 10:12:49 -0300 (ART) (envelope-from fernando@mecon.gov.ar) Received: from bal740r0.mecon.gov.ar (bal740r0.mecon.ar [10.11.1.11]) by racing.mecon.ar (8.12.8p2/8.12.8) with ESMTP id i4EDCn0X043607; Fri, 14 May 2004 10:12:49 -0300 (ART) (envelope-from fernando@mecon.gov.ar) Received: from bal740r0.mecon.gov.ar (localhost [127.0.0.1]) i4EDCnf7000878; Fri, 14 May 2004 10:12:49 -0300 (ART) (envelope-from fernando@mecon.gov.ar) Received: (from fpscha@localhost) by bal740r0.mecon.gov.ar (8.12.8p2/8.12.6/Submit) id i4EDCmHZ000877; Fri, 14 May 2004 10:12:48 -0300 (ART) (envelope-from fernando@mecon.gov.ar) X-Authentication-Warning: bal740r0.mecon.gov.ar: fpscha set sender to fernando@mecon.gov.ar using -f Date: Fri, 14 May 2004 10:12:47 -0300 From: Fernando Schapachnik To: Jan Grant Message-ID: <20040514131247.GH306@bal740r0.mecon.gov.ar> References: <777BCABEE522D5119E3E00508B6CA0B802E9AA95@CYBHQMSX05> <20040514114059.GD306@bal740r0.mecon.gov.ar> <20040514095116.GA977@straylight.m.ringlet.net> <20040514120531.GE306@bal740r0.mecon.gov.ar> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.4.2.1i X-OS: FreeBSD 4.7 - http://www.freebsd.org cc: "'freebsd-security@freebsd.org'" cc: Patrick Baker Subject: Re: How do fix a good solution against spam.. X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Security issues [members-only posting] List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 May 2004 13:13:01 -0000 En un mensaje anterior, Jan Grant escribió: > On Fri, 14 May 2004, Fernando Schapachnik wrote: > > > I don't know TMDA in depth, but with ASK, that most probably wouldn't happen. > > Here's why: every user has to define a "mailkey", which is some phrase that is > > present in his .sig. Nowadays is pretty common to get replies quoting the > > full message. ASK delivers (and also whitelists, if so configured) mail > > containing your mailkey. > > So, it's a hack that is defeated by decent sig-stripping mail clients, > and adds (dubious) value to the practice of including the entirety of a > message. Not really. Your mailkey can be just your name written in a particular way (maybe including an initial or second name), so the tipical "John S. Doe wrote:" quote will sufice. And its rare that "customized" spams uses that much info. Anyway, is not bulletproof, but like I said previously, it cut my spam intake from a lot to zero, with zero lost email. > These systems are rude. They're also broken. They offload personal > effort from the user onto other members of the internet community. That > makes them antisocial too. And come to mention it, if someone invites I disagree. It asks for a little colaboration from someone that wants to contact you in order to defeat a bigger, common enemy. Being it a one timer, is not that different from a 3-way handshake. Guess we are really off-topic here. Regards. Fernando.