From owner-freebsd-questions@FreeBSD.ORG Fri Oct 12 16:40:26 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6E3D716A4A6 for ; Fri, 12 Oct 2007 16:40:26 +0000 (UTC) (envelope-from jeffrey@goldmark.org) Received: from out1.smtp.messagingengine.com (out1.smtp.messagingengine.com [66.111.4.25]) by mx1.freebsd.org (Postfix) with ESMTP id 5FC7313C4C4 for ; Fri, 12 Oct 2007 16:40:23 +0000 (UTC) (envelope-from jeffrey@goldmark.org) Received: from compute1.internal (compute1.internal [10.202.2.41]) by out1.messagingengine.com (Postfix) with ESMTP id 0F8C731B49; Fri, 12 Oct 2007 12:40:22 -0400 (EDT) Received: from heartbeat1.messagingengine.com ([10.202.2.160]) by compute1.internal (MEProxy); Fri, 12 Oct 2007 12:40:22 -0400 X-Sasl-enc: IZNTjWqN1lYwOiffndZ66QmwfnzsVlr4QXEoer5OqM7C 1192207221 Received: from [10.1.10.136] (n114.ewd.goldmark.org [72.64.118.114]) by mail.messagingengine.com (Postfix) with ESMTP id 9FD0B1A35; Fri, 12 Oct 2007 12:40:21 -0400 (EDT) In-Reply-To: <470F874A.4080305@chamonix.reportlab.co.uk> References: <470F62F3.9040309@chamonix.reportlab.co.uk> <64D5573F-7C7F-404D-8928-E015D595A54C@goldmark.org> <470F874A.4080305@chamonix.reportlab.co.uk> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <4AF1909B-6B25-49BC-9EC8-2DD35A352950@goldmark.org> Content-Transfer-Encoding: 7bit From: Jeffrey Goldberg Date: Fri, 12 Oct 2007 11:40:19 -0500 To: Robin Becker X-Mailer: Apple Mail (2.752.2) Cc: FreeBSD_Questions FreeBSD_Questions Subject: Re: genuine bulk email X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Oct 2007 16:40:26 -0000 On Oct 12, 2007, at 9:40 AM, Robin Becker wrote: > these all sound very reasonable. However, we use the same IP for > several virtual hosts ie we have more than one domain name so the > reverse DNS is not clear to me. Is the from address inspected for > comparison with the RDNS ie if I claim to be sending from xxx.com > should my RDNS point back to xxx.com? Presumably I can have only > one IP-->domain ptr. I suspect it will be easier to set up the > front end machine as that is supposed to be for the same client. The checking will work fine with virtual domains. What matters is that DNS(rDNS(IP)) = IP = DNS(vhost) I think I've got that right. (It's a bit more complicated to state when MXes and multiple A records for the same name are considered, but this is the general idea.) Also it's not so much the header FROM or the envelope FROM, but the HELO string that is checked here. For SPF and DomainKeys, it is the envelope FROM that is checked against the IP. Presumably your mailer gives a constant HELO irrespective of the vhost that is in the envelope FROM. >> Automatic mailing is fine. What is important is how the email >> addresses were acquired. > ...... > > this isn't automatic, the sales people manually enter all the details. And how do the sales people acquire the data? I'm sure that it's okay, but you may want to have a small description of the process on your web page that you could point postmasters to if a question arises. -j