From owner-freebsd-questions Tue Dec 4 16: 7:11 2001 Delivered-To: freebsd-questions@freebsd.org Received: from fledge.watson.org (fledge.watson.org [204.156.12.50]) by hub.freebsd.org (Postfix) with ESMTP id 3538537B41B for ; Tue, 4 Dec 2001 16:07:07 -0800 (PST) Received: from localhost (doug@localhost) by fledge.watson.org (8.11.6/8.11.5) with SMTP id fB506rZ86563 for ; Tue, 4 Dec 2001 19:06:53 -0500 (EST) (envelope-from doug@safeport.com) X-Authentication-Warning: fledge.watson.org: doug owned process doing -bs Date: Tue, 4 Dec 2001 19:06:53 -0500 (EST) From: doug X-Sender: doug@fledge.watson.org To: FreeBSD-questions Subject: Re: Stopping Spam (was Hi) In-Reply-To: <20011204161718.A14154@northernbrewer.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG While on this subject; I have a question. More than 3/4's of the UBE I receive could be stopped if relays refused mail from bogus addresses, i.e., forward and/or reverse DNS of the submitting mail server does not work/match My point is not to start a philosophical discussion on the finer points of doing this, but rather as a practical manner it is so easy and much more practical than writing endless regexp's and/or adding 1(0){1,5}s (did I do that right? :) of IP addresses. Why not have available as an option to: 1) kill/deny at the HELO 2) run the 'Received: from' chain and kill/deny based on DNS For me it would be a nice feature in sendmail, but none of the MTAs seem to have this an option. The only place I could find a reference to such a thing was http://www.imc.org/ube-sol.html (who lists Sendmail Inc as a member). On Tue, 4 Dec 2001, Christopher Farley wrote: > Rick Hamell (hamellr@heorot.1nova.com) wrote: > > > > > You have a virus.. > > 90% of the Outlook Script Viruses that get rejected by my mailserver > come from this list. > > Would it be too processor-intensive to do some Postfix body_checks to > filter out messages containing attachments with various forbidden > extensions (.exe, .shs, .scr, .js ...)? > > -- > Christopher Farley > www.northernbrewer.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message