From owner-freebsd-questions@FreeBSD.ORG Thu Mar 10 09:49:29 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7C8AD16A4CE for ; Thu, 10 Mar 2005 09:49:29 +0000 (GMT) Received: from mail.freebsd-corp-net-guide.com (mail.freebsd-corp-net-guide.com [65.75.192.90]) by mx1.FreeBSD.org (Postfix) with ESMTP id C8DB043D3F for ; Thu, 10 Mar 2005 09:49:28 +0000 (GMT) (envelope-from tedm@toybox.placo.com) Received: from tedwin2k (nat-rtr.freebsd-corp-net-guide.com [65.75.197.130]) j2A9nRb66825; Thu, 10 Mar 2005 01:49:28 -0800 (PST) (envelope-from tedm@toybox.placo.com) From: "Ted Mittelstaedt" To: "Charles Swiger" , "Luciano Musacchio" Date: Thu, 10 Mar 2005 01:49:20 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) In-Reply-To: <7d17ba012b32a012d4f39ce07b70e028@mac.com> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1478 Importance: Normal cc: freebsd-questions@freebsd.org Subject: RE: how to deal with spam for good? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Mar 2005 09:49:29 -0000 This is bullshit, milter-greylist is in the ports. Greylisting does not require postfix. Just because YOU are too lazy to understand sendmail doesen't mean everyone else is. Keep in mind that Greylisting isn't going to be very effective for long if a lot of people adopt it. We run, like most ISP's, a very busy mailserver. If 3/4 of the hosts we were sending mail to did this, our server would be completely overloaded. Every other ISP in the world of any size would be in the same boat. Why should we have to go spend a lot of money buying a new mailserver that's 5 times more powerful just to handle your goofy filter? Long before the number of hosts greylisting got to 3/4 of the hosts on the Internet we would just reconfigure to start returning the mails back to our customers when we got a 541 and telling the customer to contact their coorespondent and tell the cooresponent to switch ISP's. If only a few hosts on the Internet are doing it, (and none of the major ISP's are right now) then all the rest of the big ISP's (like Hotmail) will do the same thing. If our customer's coorespondent cannot get mails from us and from hotmail, how long do you think he's going to put up with his ISP running a greylist? Long before this happened of course the spammers would mod their software to simply start retrying more. If you think about it, if they are sending a million mails a minute, and the greylist delay is 5 minutes, they merely need to construct a server that stores 5 million mails for a set period and then retries. The server never has to store more than 5 million mails at a time. It's just one more anti-spam filter that is utterly dependent on nobody else on the Internet doing it. Typical bright idea from some tech somewhere that understands just enough of the SMTP standards to cause a lot of trouble for people. The only long term solution that is going to work is modding the DNS records to designate an official SMTP server for each domain, such a plan has been in the works for a while among the standard bodies that know what they are doing. Ted > -----Original Message----- > From: owner-freebsd-questions@freebsd.org > [mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Charles Swiger > Sent: Wednesday, March 09, 2005 10:51 PM > To: Luciano Musacchio > Cc: freebsd-questions@freebsd.org > Subject: Re: how to deal with spam for good? > > > On Mar 9, 2005, at 10:53 PM, Luciano Musacchio wrote: > > I'm wondering, how does this mailing list doesn't get any spam? :), > > I need to set some filter on my mail server, can some one here give > > me a hint on this? > > Consider greylisting, amavisd, SpamAssassin, and a virus scanner of > your choice. > > Greylisting needs postfix as your MTA at the moment, but is extremely > effective for very few resources. Perl-based scripts like amavisd and > SA are a lot more resource-intensive, perhaps dspam or other tools > might also be worth looking at if your mail volume is high.... > > -- > -Chuck > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" >