From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/46021 Path: main.gmane.org!not-for-mail From: Simon Josefsson Newsgroups: gmane.emacs.gnus.general Subject: Re: TMDA (was: new spam functionality added) Date: Tue, 06 Aug 2002 01:41:07 +0200 Sender: owner-ding@hpc.uh.edu Message-ID: References: <87y9brejam.fsf@mail.paradoxical.net> NNTP-Posting-Host: localhost.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: main.gmane.org 1028590932 17633 127.0.0.1 (5 Aug 2002 23:42:12 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Mon, 5 Aug 2002 23:42:12 +0000 (UTC) Return-path: Original-Received: from malifon.math.uh.edu ([129.7.128.13]) by main.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 17brUI-0004aI-00 for ; Tue, 06 Aug 2002 01:42:10 +0200 Original-Received: from sina.hpc.uh.edu ([129.7.128.10] ident=lists) by malifon.math.uh.edu with esmtp (Exim 3.20 #1) id 17brTh-000179-00; Mon, 05 Aug 2002 18:41:33 -0500 Original-Received: by sina.hpc.uh.edu (TLB v0.09a (1.20 tibbs 1996/10/09 22:03:07)); Mon, 05 Aug 2002 18:42:00 -0500 (CDT) Original-Received: from sclp3.sclp.com (qmailr@sclp3.sclp.com [209.196.61.66]) by sina.hpc.uh.edu (8.9.3/8.9.3) with SMTP id SAA21541 for ; Mon, 5 Aug 2002 18:41:44 -0500 (CDT) Original-Received: (qmail 27464 invoked by alias); 5 Aug 2002 23:41:11 -0000 Original-Received: (qmail 27459 invoked from network); 5 Aug 2002 23:41:11 -0000 Original-Received: from 178.230.13.217.in-addr.dgcsystems.net (HELO yxa.extundo.com) (217.13.230.178) by gnus.org with SMTP; 5 Aug 2002 23:41:11 -0000 Original-Received: from latte.josefsson.org (yxa.extundo.com [217.13.230.178]) (authenticated bits=0) by yxa.extundo.com (8.12.5/8.12.5) with ESMTP id g75Nf7i2003287 for ; Tue, 6 Aug 2002 01:41:07 +0200 Original-To: ding@gnus.org Mail-Copies-To: nobody X-Hashcash: 020805:ding@gnus.org:e9a09a94d9df4a58 In-Reply-To: (prj@po.cwru.edu's message of "Mon, 05 Aug 2002 14:23:22 -0400") Original-Lines: 40 User-Agent: Gnus/5.090008 (Oort Gnus v0.08) Emacs/21.3.50 (i686-pc-linux-gnu) Precedence: list X-Majordomo: 1.94.jlt7 Xref: main.gmane.org gmane.emacs.gnus.general:46021 X-Report-Spam: http://spam.gmane.org/gmane.emacs.gnus.general:46021 prj@po.cwru.edu (Paul Jarc) writes: > Simon Josefsson wrote: >> David Masterson writes: >>> 1. The first person sends the second person a "dated" email address >>> which allows the second person to respond within (say) 5 days >>> without a cookie request. > ... >> And if the message ends up in public before this time, you will get >> spam to it and the system fails. > > For some values of "fails"; stopping some spam is better than stopping > none. Of course. >>> 2. The first person can generate a special email address for the >>> second person that will never ask for a cookie (if it's abused, the >>> address can be dropped). >> >> This doesn't work if you don't know the second person. E.g., on >> mailing lists and UseNet. > > The problem (posed by yourself) was how two *people* can communicate > if they both use TMDA and are not on each others' whitelists. Yes, and many times when I start to communicate with someone is that I post to a mailing list or UseNet group and some other person (unknown to me beforehand) replies to me personally. >>> 3. The first person adds the second person to his whitelist before >>> sending the original message. >> >> Again doesn't work on mailing lists. > > What specific failure do you have in mind? I post to the group Y, person X replies to me personally. I can't white list him, so I must bounce back a cookie request. Lots of cookies if you have many short email relationships.