From owner-freebsd-questions@FreeBSD.ORG  Thu Nov 30 07:18:52 2006
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
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 EF0E016A403
	for <freebsd-questions@freebsd.org>;
	Thu, 30 Nov 2006 07:18:52 +0000 (UTC) (envelope-from peter@bsdly.net)
Received: from skapet.datadok.no (skapet.datadok.no [194.54.107.19])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 40A5543CA2
	for <freebsd-questions@freebsd.org>;
	Thu, 30 Nov 2006 07:18:46 +0000 (GMT) (envelope-from peter@bsdly.net)
Received: from thingy.bsdly.net
	([10.168.103.11] helo=thingy.datadok.no.bsdly.net ident=peter)
	by skapet.datadok.no with esmtp (Exim 4.60)
	(envelope-from <peter@bsdly.net>) id 1GpgC3-0008SB-K0
	for freebsd-questions@freebsd.org; Thu, 30 Nov 2006 08:18:51 +0100
To: freebsd-questions@freebsd.org
References: <055401c71411$9654fc20$6400a8c0@msdi.local>
From: peter@bsdly.net (Peter N. M. Hansteen)
Date: Thu, 30 Nov 2006 08:18:50 +0100
In-Reply-To: <055401c71411$9654fc20$6400a8c0@msdi.local> (Ian Lord's message
	of "Wed, 29 Nov 2006 18:53:36 -0500")
Message-ID: <87y7ptz9k5.fsf@thingy.datadok.no>
User-Agent: Gnus/5.1007 (Gnus v5.10.7) XEmacs/21.4.19 (berkeley-unix)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Subject: Re: Spam prevention
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 30 Nov 2006 07:18:53 -0000

"Ian Lord" <mailing-lists@msdi.ca> writes:

> To fight spam, is spamassassin the best choice or should I look into
> something else ?

Spamassassin works.  If you have Microsoft machines in your setup, you
probably want clamav (antivirus) or similar as well.  And finally, do
look into running some sort of greylisting (possibly supplemented with
a tarpit for known bad senders).  

The greylisting/tarpitting part is really easy to do with PF, see eg
http://home.nuug.no/~peter/pf/en/spamd.html (part of my packet
filtering for fun and profit tutorial)

-- 
Peter N. M. Hansteen, member of the first RFC 1149 implementation team
http://www.blug.linux.no/rfc1149/ http://www.datadok.no/ http://www.nuug.no/
"First, we kill all the spammers" The Usenet Bard, "Twice-forwarded tales"
20:11:56 delilah spamd[26905]: 146.151.48.74: disconnected after 36099 seconds