From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/46012 Path: main.gmane.org!not-for-mail From: Simon Josefsson Newsgroups: gmane.emacs.gnus.general Subject: Re: new spam functionality added Date: Mon, 05 Aug 2002 20:07:08 +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 1028570869 25665 127.0.0.1 (5 Aug 2002 18:07:49 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Mon, 5 Aug 2002 18:07:49 +0000 (UTC) Cc: ding@gnus.org 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 17bmGh-0006fo-00 for ; Mon, 05 Aug 2002 20:07:47 +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 17bmGY-0007bi-00; Mon, 05 Aug 2002 13:07:38 -0500 Original-Received: by sina.hpc.uh.edu (TLB v0.09a (1.20 tibbs 1996/10/09 22:03:07)); Mon, 05 Aug 2002 13:08:02 -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 NAA20995 for ; Mon, 5 Aug 2002 13:07:46 -0500 (CDT) Original-Received: (qmail 16135 invoked by alias); 5 Aug 2002 18:07:12 -0000 Original-Received: (qmail 16130 invoked from network); 5 Aug 2002 18:07:12 -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 18:07:12 -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 g75I77i2031656; Mon, 5 Aug 2002 20:07:07 +0200 Original-To: David Masterson Mail-Copies-To: nobody X-Hashcash: 020805:dmaster@synopsys.com:aa9fff66a66c2c1b X-Hashcash: 020805:ding@gnus.org:9f235f187f98a502 In-Reply-To: (David Masterson's message of "31 Jul 2002 15:05:50 -0700") Original-Lines: 34 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:46012 X-Report-Spam: http://spam.gmane.org/gmane.emacs.gnus.general:46012 David Masterson writes: >>>>>> Simon Josefsson writes: > >> (Assuming TMDA contains the part which bounces mail, asking the sender >> to answer with a cookie to deliver the mail. That's annoying, and I >> haven't understood how two people not on each other's whitelist could >> ever communicate with each other if they both uses the scheme. > > Three ways that I can think of: > > 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. This will sort of work, but it requires a UI for the first person to specify the time delay. Sometimes I send mail I know wont be read for or replied to for many months, and having it default to 3 months will allow too much spam. E.g., bug reports. And if the message ends up in public before this time, you will get spam to it and the system fails. > 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. It deteriorates into using temporary email addresses all the time, which breaks address books etc. > 3. The first person adds the second person to his whitelist before > sending the original message. Again doesn't work on mailing lists.