From owner-freebsd-questions@freebsd.org Thu Jan 12 01:34:29 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id F31ADCAA8A2 for ; Thu, 12 Jan 2017 01:34:29 +0000 (UTC) (envelope-from rcarter@pinyon.org) Received: from h2.pinyon.org (h2.pinyon.org [65.101.20.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CC46110DC for ; Thu, 12 Jan 2017 01:34:29 +0000 (UTC) (envelope-from rcarter@pinyon.org) Received: by h2.pinyon.org (Postfix, from userid 58) id 36B9FBFEE; Wed, 11 Jan 2017 18:34:28 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=pinyon.org; s=DKIM; t=1484184868; bh=LBVSttTISrjX/Vh6s/llLiTq2YBejI2NM7tS4dGFqBM=; h=Subject:To:References:From:Date:In-Reply-To; b=YnsVgm3ApMbHA+sY9F6fQ/9PT43Ol7jgeSA+AAnapqQ6MVW/yw59KaEgR1RobXcgz kpwzjHXswLOLf7f7W/JCm78y9o2xGFW8EtB3XOr98VQ3wVfTgONpfvGrVmmcvgFal/ SGw7MqErnNg7uY8Ti3WlvEXAeSwrbq+vFU+aeZWU= X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on h2.pinyon.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.1 Received: from [10.0.10.15] (h1.pinyon.org [65.101.20.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by h2.pinyon.org (Postfix) with ESMTPSA id C3822BFD6 for ; Wed, 11 Jan 2017 18:34:26 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=pinyon.org; s=DKIM; t=1484184866; bh=LBVSttTISrjX/Vh6s/llLiTq2YBejI2NM7tS4dGFqBM=; h=Subject:To:References:From:Date:In-Reply-To; b=VALZZbmuJOOxbrJclq6dv6/HQZvlZZ4LIH7Y7jG8aZNJuYIIa6D7gA+CF+LJV63rA pz9f8b/i3QBvvxQAhycHTwNcLr/IywV1FAQXTFP5j1rbCVBGVMb9rzVrQLfL1ZmMDg QxeKFj0XcFbl3hHLVMh8Y25Cc0i9yaZUVgKPGpto= Subject: Re: spamassassin not lethal anymore To: freebsd-questions@freebsd.org References: <2463a238-e10f-e81d-cab1-5a7eaf774590@pinyon.org> <20170111210507.2dc39818c6e9d439abb21ee6@sohara.org> <8016faa3-5af4-6c2d-acdf-9b02f7f1afc8@pinyon.org> From: "Russell L. Carter" Message-ID: Date: Wed, 11 Jan 2017 18:34:26 -0700 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Jan 2017 01:34:30 -0000 On 01/11/17 17:24, Kurt Buff wrote: > Snippety snip... > > On Wed, Jan 11, 2017 at 4:13 PM, Russell L. Carter wrote: >> On 01/11/17 14:05, Steve O'Hara-Smith wrote: >>> >>> On Wed, 11 Jan 2017 13:45:47 -0700 >>> "Russell L. Carter" wrote: >>> most of it botnet sourced. I've pretty much eliminated it now by a >>> combination of installing dcc and razor plugins to spamassassin (reduced >>> the spam getting through by 70% or so) and adding a backup MX with a free >>> service that only accepts messages to relay when the primary is down (it's >>> amazing how much spam stopped coming in when I did that). >>> >> >> I'm not sure what you mean here, can you elaborate a bit more? I can >> do anything I like with my MX hosts so I'm game. I *think* I'm >> already doing that. I have multiple domains, and so I have a primary >> MX and a couple of backup MX hosts (one of which is effectively a >> passive dovecot replicator, lordy that works fantastic). The backup >> MX hosts are lower priority than the primary. Are you doing something >> different? > > A secondary MX that refuses mail when the primary is up and running > foils one of the favorite tactics of spammers - they will often target > the secondary MX because those are often not as up to date with > anti-spam measures. Most spambots try one MX, one time only. > > Many spambots will try that secondary MX, get refused with a 4xx > error, and not bother to try the primary MX at all. > > It can be a big win, in the right situation. Ah. Awesome. How do I do that? Russell > > Kurt > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >