From owner-freebsd-stable Thu Oct 16 18:56:52 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id SAA09690 for stable-outgoing; Thu, 16 Oct 1997 18:56:52 -0700 (PDT) (envelope-from owner-freebsd-stable) Received: from gatekeeper.tsc.tdk.com (root@gatekeeper.tsc.tdk.com [207.113.159.21]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id SAA09685 for ; Thu, 16 Oct 1997 18:56:50 -0700 (PDT) (envelope-from gdonl@tsc.tdk.com) Received: from sunrise.gv.tsc.tdk.com (root@sunrise.gv.tsc.tdk.com [192.168.241.191]) by gatekeeper.tsc.tdk.com (8.8.4/8.8.4) with ESMTP id SAA12313; Thu, 16 Oct 1997 18:56:20 -0700 (PDT) Received: from salsa.gv.tsc.tdk.com (salsa.gv.tsc.tdk.com [192.168.241.194]) by sunrise.gv.tsc.tdk.com (8.8.5/8.8.5) with ESMTP id SAA04856; Thu, 16 Oct 1997 18:56:19 -0700 (PDT) Received: (from gdonl@localhost) by salsa.gv.tsc.tdk.com (8.8.5/8.8.5) id SAA27779; Thu, 16 Oct 1997 18:56:17 -0700 (PDT) From: Don Lewis Message-Id: <199710170156.SAA27779@salsa.gv.tsc.tdk.com> Date: Thu, 16 Oct 1997 18:56:16 -0700 In-Reply-To: "Chad R. Larson" "Re: Anti-spam sendmail in 2.2.5?" (Oct 15, 10:07pm) X-Mailer: Mail User's Shell (7.2.6 alpha(3) 7/19/95) To: chad@dcfinc.com, root@eyelab.psy.msu.edu (Gary Schrock) Subject: Re: Anti-spam sendmail in 2.2.5? Cc: dkelly@hiwaay.net, freebsd-stable@FreeBSD.ORG Sender: owner-freebsd-stable@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Oct 15, 10:07pm, "Chad R. Larson" wrote: } Subject: Re: Anti-spam sendmail in 2.2.5? } Also under consideration is insisting on a HELO during the SMTP } handshake and doing a DNS lookup on that system. If they don't match, } you refuse the traffic. I'm pretty sure this isn't strictly legal according to the RFCs, and it will probably block some non-spam mail. That's not to say it's not effective against spam. --- Truck