From owner-freebsd-isp@FreeBSD.ORG Fri Apr 29 15:49:13 2005 Return-Path: Delivered-To: freebsd-isp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4902916A4CE for ; Fri, 29 Apr 2005 15:49:13 +0000 (GMT) Received: from pgh.nepinc.com (pgh.nepinc.com [66.207.129.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id A68AD43D58 for ; Fri, 29 Apr 2005 15:49:12 +0000 (GMT) (envelope-from jimd@nepinc.com) Received: from pptp8.pgh.nepinc.com (pptp8.pgh.nepinc.com [192.168.97.208]) (authenticated bits=0) by pgh.nepinc.com (8.12.11/8.12.8) with ESMTP id j3TFnBNG006519 for ; Fri, 29 Apr 2005 11:49:12 -0400 (EDT) (envelope-from jimd@nepinc.com) From: Jim Durham Organization: NEP Supershooters To: freebsd-isp@freebsd.org Date: Fri, 29 Apr 2005 11:49:10 -0400 User-Agent: KMail/1.8 References: <200504281032.33822.jimd@nepinc.com> <42714C91.6060705@diewebmaster.at> In-Reply-To: <42714C91.6060705@diewebmaster.at> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200504291149.10651.jimd@nepinc.com> Subject: Re: Mail Server recommendations (digest) X-BeenThere: freebsd-isp@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: jim.durham@nepinc.com List-Id: Internet Services Providers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Apr 2005 15:49:13 -0000 I'd like to thank everyone who replied with useful suggestions to my mail server request. It would be too much to post all the replies, so.... The consensus seems to be that a solution using separate machines for virus and spam scanning ahead of the server that provides smtp and pop services to the users would be a more 'elegant' solution than bigger iron. The solution that seems good to me after sifting all the responses is to load-balance port 25 and feed 2 or 3 machines that virus and spam scan email and then relay it to the MTA on the machine with the user's mailboxes. I'm using 'balance' from ports to load balance our Citrix servers and it seems to work quite well. I will probably try this for port 25. Christian Damm asked questions regarding the ratio of spam to ham, and number of virus emails. I was suprised to see that we are scanning and rejecting at least 2000 emails a day for spam and about 30 for viruses. IOW, there are more spams than legitimate emails. 'sma' says we are doing about 2700 emails per day. So thanks, Christian, Ari, Chuck, Matthew, Freddie, Lawrence and Steve. All good suggestions. Now...how do I do this in between fixing XP problems? -Jim