From owner-freebsd-questions@FreeBSD.ORG Mon Dec 29 02:01:04 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 179BC16A4CE for ; Mon, 29 Dec 2003 02:01:04 -0800 (PST) Received: from munk.nu (mail.munk.nu [213.152.51.194]) by mx1.FreeBSD.org (Postfix) with ESMTP id C32CB43D48 for ; Mon, 29 Dec 2003 02:01:02 -0800 (PST) (envelope-from munk@munk.nu) Received: from munk by munk.nu with local (Exim 4.24; FreeBSD) id 1AauCs-0006c6-00; Mon, 29 Dec 2003 10:01:02 +0000 Date: Mon, 29 Dec 2003 10:01:01 +0000 From: Jez Hancock To: Brent Bailey Message-ID: <20031229100101.GB25036@users.munk.nu> Mail-Followup-To: Brent Bailey , questions@freebsd.org References: <2104.65.162.190.4.1072621896.squirrel@new.host.name> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2104.65.162.190.4.1072621896.squirrel@new.host.name> User-Agent: Mutt/1.4.1i cc: questions@freebsd.org Subject: Re: The best Anti spam - Anti virus email solution X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Dec 2003 10:01:04 -0000 On Sun, Dec 28, 2003 at 09:31:36AM -0500, Brent Bailey wrote: > Hello, > Im looking for you thoughts and opinions on Anti -Spam and Anti virus > solutions for email servers. Im getting ready to implement a email server > solution for an ISP. Im very use to sendmail as ive been able to compile > sendmail to do rbl checks and use access.db and procmail filtering and > spamassassin > and it seems to work pretty good..although there does seem to be a small > amount of "false positives" I suppose this is going to happen to some > extent. > So im looking to this mailing list to get your opinions and thoughts on > this. Im more than open to the idea of useing something other than > sendmail :-) You may have more joy asking on freebsd-isp if this is indeed for an ISP setup. I've heard that clamd(?) is supposed to be good for virus scanning on the OSS side or sophos for a paid solution, although how these scale for ISP performance I don't know. You already mentioned spamassassin which I think is fairly standard, but again I don't know how it would scale for large numbers of users. Also you'd have to consider your privacy policy and whether you want to completely drop all mail very likely to be spam or whether you just want to rewrite the 'subject:' header to indicate that the mail might be spam. As an ISP user I'm not sure I'd like my ISP to just delete emails automaticaly on my behalf (even though as a mail server admin I do know that dropping mails that have an SA score of over say 30 are very very unlikely to contain spam). Again this is something to think about in your privacy policy I suppose. -- Jez Hancock - System Administrator / PHP Developer http://munk.nu/ http://jez.hancock-family.com/ - personal weblog http://ipfwstats.sf.net/ - ipfw peruser traffic logging