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Re: [ietf-smtp] Dombox - A Zero Spam Mail System

2019-09-25 05:03:35
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In message <04a6670a-a661-7826-e1e6-c7372af8fce7(_at_)tana(_dot_)it>, Alessandro
Vesely <vesely(_at_)tana(_dot_)it> writes

On Wed 25/Sep/2019 04:06:38 +0200 Viruthagiri Thirumavalavan wrote:
Here is my white paper <https://www.dombox.org/dombox.pdf>I published in Feb 
2019.

   Bad guy forge the mail like it’s coming from 
president(_at_)whitehouse(_dot_)gov.
   Challenge mails are being sent to president(_at_)whitehouse(_dot_)gov

That's gonna be tagged as yet another witch hunt...

There is also an underlying assumption that when the challenge email is
received then the question it poses will be answered honestly

It has long been my policy when receiving such emails to always answer
that "yes I sent this email" -- whether or not this is true

My hope is that either the person trying out challenge response will
realise that dumping their spam filtering costs onto strangers is unwise
or they will conclude, incorrectly, that I am a spammer and block all
further email "from" me.  Either way they don't bother me again and I am
happy, so the effort of responding to them has been worthwhile

- From time to time volumes of challenge response email have been high,
for example when Earthlink used this type of system -- and so I
automated the sending of the responses ... they did have CAPTCHAs to
discourage such automation, but since they only had 31 CAPTCHA images
this didn't slow down the automation all that much

https://www.lightbluetouchpaper.org/2006/02/12/earthlink-has-just-
31-challenge-response-captchas/

- -- 
richard                                                   Richard Clayton

Those who would give up essential Liberty, to purchase a little temporary 
Safety, deserve neither Liberty nor Safety. Benjamin Franklin 11 Nov 1755

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