Date: Thu, 14 Feb 2002 13:35:16 -0330 From: Graham Rose <graham@avint.net> To: freebsd-security@freebsd.org Subject: Re: sendmail ; bogus letters Message-ID: <02021413401002.02159@hercules.avint.net> In-Reply-To: <Pine.BSF.4.44.0202140740060.52689-100000@R181172.resnet.ucsb.edu> References: <Pine.BSF.4.44.0202140740060.52689-100000@R181172.resnet.ucsb.edu>
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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
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