Date: Sat, 17 Feb 2001 00:52:18 -0400 (AST) From: The Hermit Hacker <scrappy@hub.org> To: <sendmail@sendmail.org> Cc: <ken@mui.net>, <freebsd-questions@FreeBSD.ORG> Subject: Re: simple idea to rid the world of most spam Message-ID: <Pine.BSF.4.33.0102170051190.81548-100000@mobile.hub.org> In-Reply-To: <28130.982383466@euclid.cs.niu.edu>
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actually, what I'd like to know how to implement, if possible, is a filter
in sendmail that allows for the use of ident to verify the user sending
the email exists ... basically, if I can't reply to it, I don't want to
receive it ...
On Fri, 16 Feb 2001, Neil W Rickert wrote:
> ken@mui.net wrote:
>
> >Ok all, here's something that has been bugging me for months. It's
> >a very very simple idea, but I don't have the knowledge to do this:
>
> >Have you ever noticed how spam seems to come in the same
> >order and how there's a ton of incorrect email addresses that is
> >sent?
>
> This sometimes happens.
>
> >Why can't some kind of email filter be set up that works like this?
>
> >incorrect email sent to account A-----> turn flag on
> >2nd incorrect email sent to account B ---------> turn 2nd flag on
> >if 2 flags, then refuse ALL email sent from that account, place that
> >name in the ban list.
>
> >The chances of someone sending email to 2 accounts that never
> >existed = 99% chance that person is sending spam.
>
> >I've already talked to some people till I'm blue in the face. I'm
> >certainly not smart enough to code it, but I'm hoping someone smart
> >out there does this ...
>
> The important questions:
>
> Will this be reliable? That is, will it mainly stop spam, and not
> have much effect on non-spam?
>
> Will this stop enough spam to be worth the trouble of implementing
> it?
>
> Will it be easy to implement?
>
> Will spammers be easily able to change their behavior to bypass
> this spam stopper?
>
> Will system administrators be willing to use this option?
>
> My personal assessment is that this is not worth doing. But perhaps
> some of my colleagues will have different ideas.
>
> In any case, thank you for sending us the suggestion.
>
> -NWR
>
>
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Marc G. Fournier ICQ#7615664 IRC Nick: Scrappy
Systems Administrator @ hub.org
primary: scrappy@hub.org secondary: scrappy@{freebsd|postgresql}.org
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