From owner-freebsd-isp Sun May 11 20:29:43 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id UAA25583 for isp-outgoing; Sun, 11 May 1997 20:29:43 -0700 (PDT) Received: from ns2.harborcom.net (ns2.harborcom.net [206.158.4.4]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id UAA25576 for ; Sun, 11 May 1997 20:29:40 -0700 (PDT) Received: from localhost (bradley@localhost) by ns2.harborcom.net (8.8.5/8.8.5) with SMTP id XAA02965; Sun, 11 May 1997 23:28:49 -0400 (EDT) Date: Sun, 11 May 1997 23:28:49 -0400 (EDT) From: Bradley Dunn X-Sender: bradley@ns2.harborcom.net To: John Beukema cc: freebsd-isp@FreeBSD.ORG Subject: Re: Sendmail hack In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-isp@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Mon, 12 May 1997, John Beukema wrote: > How do you stop spammers who use an existing address which is not theirs? a. Subscribe to Vixie's Black Hole eBGP feed. This will stop some of it. b. Check the headers and see where it is coming from. If they are not using third-party relaying, filter their IPs at your router. c. If they are using third-party relaying, notify the postmaster at the victim site and encourage them to implement third-party relay prevention. pbd -- Why can't you be a non-conformist like everyone else?