From owner-freebsd-chat Tue Dec 19 23:43:33 2000 From owner-freebsd-chat@FreeBSD.ORG Tue Dec 19 23:43:29 2000 Return-Path: Delivered-To: freebsd-chat@freebsd.org Received: from mail8.sc.rr.com (fe8.southeast.rr.com [24.93.67.55]) by hub.freebsd.org (Postfix) with ESMTP id 8511837B402 for ; Tue, 19 Dec 2000 23:43:29 -0800 (PST) Received: from sc.rr.com ([24.88.102.101]) by mail8.sc.rr.com with Microsoft SMTPSVC(5.5.1877.537.53); Wed, 20 Dec 2000 02:41:59 -0500 Received: (from dmaddox@localhost) by sc.rr.com (8.11.1/8.11.1) id eBK7hZc03049; Wed, 20 Dec 2000 02:43:35 -0500 (EST) (envelope-from dmaddox) Date: Wed, 20 Dec 2000 02:43:35 -0500 From: "Donald J . Maddox" To: Stephen McKay Cc: dmaddox@sc.rr.com, freebsd-chat@FreeBSD.ORG Subject: Re: No cable modems?? Message-ID: <20001220024335.B2993@cae88-102-101.sc.rr.com> Reply-To: dmaddox@sc.rr.com Mail-Followup-To: Stephen McKay , dmaddox@sc.rr.com, freebsd-chat@FreeBSD.ORG References: <20001219182739.C61697@cae88-102-101.sc.rr.com> <200012200518.eBK5IsB15659@dungeon.home> <20001220003436.A345@cae88-102-101.sc.rr.com> <200012200739.eBK7doB17742@dungeon.home> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200012200739.eBK7doB17742@dungeon.home>; from mckay@thehub.com.au on Wed, Dec 20, 2000 at 05:39:50PM +1000 Return-Receipt-To: dmaddox@sc.rr.com Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wed, Dec 20, 2000 at 05:39:50PM +1000, Stephen McKay wrote: > On Wednesday, 20th December 2000, "Donald J . Maddox" wrote: > > >On Wed, Dec 20, 2000 at 03:18:54PM +1000, Stephen McKay wrote: > >> On Tuesday, 19th December 2000, "Donald J . Maddox" wrote: > >> > >> >... while talking to frmug.org.: > >> >>>> MAIL From: > >> ><<< 550 no cable modems here > >> >554 5.0.0 roberto@keltia.freenix.fr... Service unavailable > >> > >> It's a spam reduction move. I'm surprised hub.freebsd.org accepts your > >> mail! You should funnel your mail through your ISP's central mail hub. > > >I'm not sure I follow this. Why would I be likely to be a > >spammer just because I use a cable modem? Not sure what > >you mean about funneling, either. All my mail does go through > >my ISPs mail gateway. Apparently they don't rewrite my headers > >and I don't masquerade. Are you saying that I should? > > The idea is that your ISP's mail system can enforce valid return addresses > and similar things. People who spam often make up what they like and > connect directly from their modem (cable or otherwise) to your inbox. > Removing them from the set of systems that can send you mail reduces the > amount of spam you receive. > > I checked the headers in your current message. I assume that > cae88-102-101.sc.rr.com [24.88.102.101] is a cable modem address, > not your ISP's mail hub. So, your system is mailing directly to > the world. My system sends all mail to smtp.pacific.net.au (using > the smart relay host sendmail facility) rather than to the final > recipient. That is what I mean by funneling through your ISP's > mail hub. > > Read http://mail-abuse.org/dul to find out more. Just for the record, I changed my sendmail.mc to use smarter-host and masquerade, but it still gets rejected by Ollivier :-( To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message