From owner-freebsd-questions Sun Jan 18 07:38:30 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id HAA15756 for questions-outgoing; Sun, 18 Jan 1998 07:38:30 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from didda.est.is (root@didda.est.is [194.144.208.205]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id HAA15745 for ; Sun, 18 Jan 1998 07:38:20 -0800 (PST) (envelope-from totii@est.is) Received: from est.is (totii@didda.est.is [192.168.255.1]) by didda.est.is (8.8.7/8.8.7) with ESMTP id KAA08290; Sun, 18 Jan 1998 10:52:30 GMT (envelope-from totii@est.is) Message-ID: <34C1DEED.99DEEA9C@est.is> Date: Sun, 18 Jan 1998 10:52:29 +0000 From: Thordur Ivarsson X-Mailer: Mozilla 4.04 [en] (X11; I; FreeBSD 2.2.5-RELEASE i386) MIME-Version: 1.0 To: Dan Busarow CC: Font , questions@FreeBSD.ORG Subject: Re: MAIL FROM: address check commented out in /etc/mail additions? References: Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk Dan Busarow wrote: > > On Sun, 18 Jan 1998, Thordur Ivarsson wrote: > > This rule is rather nasty: If sender has not legimate A record in name > > server the rule fails and sends back error, CNAME record is not enough > > for sender. > > It may be that from time to time we bounce legitimate mail. But > I haven't received any complaints and I've had this turned on for > several months now. We also return a 451 error meaning that they > will retry on a DNS hickup. > I am not saying that it is not goot, just telling the truth, If you don't know of this 'annoyance' of dns lookup for mail, you can not answer someone with legimate mailaddress (CNAME though) that asks you why his mail bounces. I belive that everyone that use good SPAM filtering are doing good things and when all measures are taken, with resonable care and knowledge of what we are doing, the spammers are off the net. The golden rule is always: Do what ever you can, but understand why and how! -- Þórður Ívarsson Thordur Ivarsson Rafeindavirki Electronic technician Norðurgötu 30 Nordurgotu 30 Box 309 Box 309 602 Akureyri 602 Akureyri Ísland Iceland --------------------------------------------- FreeBSD has good features, Some others are full of unwanted features! ---------------------------------------------