From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/46013 Path: main.gmane.org!not-for-mail From: prj@po.cwru.edu (Paul Jarc) Newsgroups: gmane.emacs.gnus.general Subject: Re: TMDA (was: new spam functionality added) Date: Mon, 05 Aug 2002 14:23:22 -0400 Organization: What did you have in mind? A short, blunt, human pyramid? 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 1028571861 28888 127.0.0.1 (5 Aug 2002 18:24:21 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Mon, 5 Aug 2002 18:24:21 +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 17bmWi-0007Vo-00 for ; Mon, 05 Aug 2002 20:24:20 +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 17bmW9-0007jR-00; Mon, 05 Aug 2002 13:23:45 -0500 Original-Received: by sina.hpc.uh.edu (TLB v0.09a (1.20 tibbs 1996/10/09 22:03:07)); Mon, 05 Aug 2002 13:24:12 -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 NAA21023 for ; Mon, 5 Aug 2002 13:23:57 -0500 (CDT) Original-Received: (qmail 16838 invoked by alias); 5 Aug 2002 18:23:23 -0000 Original-Received: (qmail 16833 invoked from network); 5 Aug 2002 18:23:23 -0000 Original-Received: from multivac.student.cwru.edu (HELO multivac.cwru.edu) (@129.22.96.25) by gnus.org with SMTP; 5 Aug 2002 18:23:23 -0000 Original-Received: (qmail 18550 invoked by uid 500); 5 Aug 2002 18:23:44 -0000 Original-To: ding@gnus.org In-Reply-To: (Simon Josefsson's message of "Mon, 05 Aug 2002 20:07:08 +0200") Mail-Copies-To: nobody Mail-Followup-To: ding@gnus.org Original-Lines: 38 User-Agent: Gnus/5.090008 (Oort Gnus v0.08) Emacs/21.2 (i686-pc-linux-gnu) Precedence: list X-Majordomo: 1.94.jlt7 Xref: main.gmane.org gmane.emacs.gnus.general:46013 X-Report-Spam: http://spam.gmane.org/gmane.emacs.gnus.general:46013 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. >> 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. Usenet can't use TMDA. Mailing lists can, but in that case, you'd use a wide-open envelope sender address, for the mailing list to sends its confirmation request to, and your normal, TMDA-protected From address. You'll get the MLM's confirmation request through your wide-open address; you'll confirm your message; the MLM will rewrite the envelope sender before distributing your message; other subscribers won't see it. >> 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? paul