From owner-freebsd-security@FreeBSD.ORG Fri May 14 01:08:23 2004 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F165316A4CE for ; Fri, 14 May 2004 01:08:23 -0700 (PDT) Received: from mail.telsatgp.com.pl (pa79.pleszew.sdi.tpnet.pl [217.96.180.79]) by mx1.FreeBSD.org (Postfix) with SMTP id 0E92543D3F for ; Fri, 14 May 2004 01:08:21 -0700 (PDT) (envelope-from sgp@telsatgp.com.pl) Received: (qmail 95027 invoked from network); 14 May 2004 08:08:20 -0000 Received: from slawek.telsatgp.com.pl (HELO Slawek) (192.168.5.5) by pa79.pleszew.sdi.tpnet.pl with SMTP; 14 May 2004 08:08:20 -0000 Message-ID: <00e201c4398a$e56aac60$0505a8c0@Slawek> From: "Slawek" To: , References: <1886.213.112.193.11.1084410012.squirrel@mail.hackunite.net><20040513040222.2b80e76e.freebsd@yazzy.org> <40A32939.9000100@kernel32.de> <20040513212144.GA37257@carrick.bishnet.net> Date: Fri, 14 May 2004 10:10:18 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 FL-Build: Fidolook 2002 (SL) 6.0.2800.85 - 28/1/2003 19:07:30 X-Organisation: Telsat GP Subject: Re: How do fix a good solution against spam.. X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Security issues [members-only posting] List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 May 2004 08:08:24 -0000 Hello! In message to "Marian Hettwer" sent Thu, 13 May 2004 22:21:44 +0100 you wrote: >>> Not only it's way faster than perl based messagewall, amavisd and >>> mailscanner etc but it also has neat stuff like making connections >>> back to the sender's MX checking for validity of the sender's email. >> >> This Feature sounds interesting. How is it actually called in exim ? >> I'd like to check the exim docu to see some details, because it really >> sounds interesting. >> >> Could you provide me with some keywords to search for ? TB> In Exim you're looking for sender callout verification. TB> http://www.exim.org/exim-html-4.30/doc/html/spec_38.html#SECT38.21 TB> It's pretty trivial to turn on, and in my experience works well. One should be careful with source address checking as it may block mails in e-mail discussion lists when source e-mail address is nonexistent. Using things like "NO_SPAM" or "DELETE_THIS" in e-mail address is common (and justified) in discussion lists. -- Slawomir Piotrowski