From owner-freebsd-questions@FreeBSD.ORG Sat Apr 7 04:33:10 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 4BCA416A401 for ; Sat, 7 Apr 2007 04:33:10 +0000 (UTC) (envelope-from mikhailg@webanoide.org) Received: from shanshito.webanoide.org (shanshito.webanoide.org [150.101.108.110]) by mx1.freebsd.org (Postfix) with ESMTP id AA39813C455 for ; Sat, 7 Apr 2007 04:33:09 +0000 (UTC) (envelope-from mikhailg@webanoide.org) Received: from [172.26.4.34] (maxito.hba.navalradio.cl [172.26.4.34]) (authenticated bits=0) by shanshito.webanoide.org (8.13.8/8.13.8) with ESMTP id l374WutT005403 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Sat, 7 Apr 2007 04:32:57 GMT (envelope-from mikhailg@webanoide.org) Message-ID: <46171EF8.2060009@webanoide.org> Date: Sat, 07 Apr 2007 14:32:56 +1000 From: Mikhail Goriachev Organization: Webanoide User-Agent: Thunderbird 1.5.0.10 (Macintosh/20070221) MIME-Version: 1.0 To: Derek Ragona References: <56576.192.168.125.142.1175794565.squirrel@webmail.dfwlp.org> <6.0.0.22.2.20070405131910.024eedd8@mail.computinginnovations.com> In-Reply-To: <6.0.0.22.2.20070405131910.024eedd8@mail.computinginnovations.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Jonathan Horne , freebsd-questions@freebsd.org Subject: Re: slightly OT - my freebsd email topology 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: Sat, 07 Apr 2007 04:33:10 -0000 Derek Ragona wrote: > At 12:36 PM 4/5/2007, Jonathan Horne wrote: >> currently, my email server is just a single box, accepting and sending emails >>from and to the internet. spamassassin and sendmail, and so far, it works >> satisfactory. >> >> i would like to change it up, so that i have a pair of servers doing MX >>from the >> internet, which then passes to an internal server for delivery. if i do >> that, i >> could remove spamassassin from the internal server, and run it on just the 2 >> external. all those configurations is really not my issue here... what im >> really pondering is how would external servers that are seperate from >> where the >> target mailboxes are, know which addressess are acceptable and which to >> return a >> 550? >> >> does anyone have any setups that are similar to this, and could advise me or >> point me in the right direction? >> >> thanks, >> jonathan > > > Generally you want to filter and bounce mail at the point of origin, so > your mail server that first accepts the mail. As long as you have the > bandwidth on that server you would spam check, virus check there, bouncing > any bad ones. Then forward to your internal server only clean mail for > delivery. Bounces generate backscatters. The idea is to filter and *reject* (instead of bouncing) at the point of origin. Regards, Mikhail. -- Mikhail Goriachev Webanoide Telephone: +61 (0)3 62252501 Mobile Phone: +61 (0)4 38255158 E-Mail: mikhailg@webanoide.org Web: www.webanoide.org