From owner-freebsd-security Thu Feb 14 7:57:21 2002 Delivered-To: freebsd-security@freebsd.org Received: from NTMAIL.avint.net (ntmail.avint.net [198.165.75.239]) by hub.freebsd.org (Postfix) with ESMTP id 0B74B37B405 for ; Thu, 14 Feb 2002 07:57:18 -0800 (PST) Received: from hercules.avint.net ([198.165.75.7]) by NTMAIL.avint.net (Post.Office MTA v3.5.3 release 223 ID# 0-52622U2500L250S0V35) with SMTP id net for ; Thu, 14 Feb 2002 12:25:35 -03-3 From: Graham Rose Reply-To: graham@infotechcanada.com Organization: Avalon InterConnect & Infotech Canada To: freebsd-security@freebsd.org Subject: Re: sendmail ; bogus letters Date: Thu, 14 Feb 2002 13:35:16 -0330 X-Mailer: KMail [version 1.0.28] Content-Type: text/plain References: In-Reply-To: MIME-Version: 1.0 Message-Id: <02021413401002.02159@hercules.avint.net> Content-Transfer-Encoding: 8bit Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Add entries for the Open Relay Database (www.ordb.org & www.ordb.org/faq/#sendmail) and spamcop.net (www.spamcop.net) Configuring your mail server to use these lists of known spammers will block most spam. I've noticed a 10 fold decrease on my mail server, with thousands of spam blocked each day. Note: Setup instructions vary depending on the version of sendmail you run. See above urls for details. -- Graham Rose Network Administrator Avalon InterConnect & Infotech Canada graham@infotechcanada.com graham@avint.net http://www.avint.net http://www.infotechcanada.com On Thu, 14 Feb 2002, Dave wrote: > Some of my accounts are getting some spam (what else is new on the > internet?). However, the "from" addresses of these letters are not even > valid (as is with a lot of spam). In a couple of cases they are, but I > question the letter actually came from the sender listed. > > Is there something I can do in the sendmail.cf file or other configuration > change to drop these kinds of letters? Other solutions? > > I've thought of denying messages from free mail sites, but I imagine some > spam is from elsewhere. I would think it is possible to ditch bulkmail, I > know that yahoo.com has a bulkmail folder -- and I heard yahoo runs > FreeBSD too :) How are the letters discriminated from eachother as a bulk > versus a possible real one? > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message