Date: Tue, 27 Apr 2010 16:42:55 -0500 From: John <john@starfire.mn.org> To: "Randal L. Schwartz" <merlyn@stonehenge.com> Cc: freebsd-questions@freebsd.org Subject: Re: Really simple spam trap - /dev/pf permissions? Message-ID: <20100427214255.GA93302@elwood.starfire.mn.org> In-Reply-To: <861ve0he9d.fsf@red.stonehenge.com> References: <20100427193106.GA91570@elwood.starfire.mn.org> <861ve0he9d.fsf@red.stonehenge.com>
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On Tue, Apr 27, 2010 at 12:44:14PM -0700, Randal L. Schwartz wrote: > >>>>> "John" == John <john@starfire.mn.org> writes: > > John> (Obviously, I'll want to add to my cron scripts to age entries out > John> of the spammers table, just to keep it down to a manageable size. > John> I already have two dozen entries.) > > You'll have a lot of collateral damage. I've worked with a lot of > schemes over the years for spamfighting. A lot of spam is sourced > inside corporate or educational choke points, meaning that a spam > message from inside a company would block all remaining mail from that > company. So, for this to work, you really need to time out your blocks > no more than an hour or two later, or legit mail will get unnecessarily > delayed. Grr. I just expired the first address, at four hours old, and IMMEDIATELY got a bunch Pfizer spams that were just delayed... This is certainly not an easy nut to crack. -- John Lind john@starfire.MN.ORG
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