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

2019-10-02 01:00:23
Sorry for the late reply. There was a family function which I had to attend
and I couldn't find enough time to respond.

So how does your system classify this email you're reading right now?
Is it spam, or bulk mail, or something the user wanted?


We decide whether it's a human-to-human mail or website-related-mail based
on the RCPT TO address type. Not based on sender.

MAIL FROM:<someuser(_at_)acme(_dot_)com>
250 OK
RCPT TO:<quora(_dot_)com(_at_)test123(_dot_)example(_dot_)com>
250 OK
RCPT TO:<normal(_at_)example(_dot_)com>
250 OK
RCPT TO:<restricted(_at_)example(_dot_)com>
250 OK

Mail will be accepted for quora(_dot_)com(_at_)test123(_dot_)example(_dot_)com 
only if acme.com is
whitelisted in _sad.quora.com => "v=sad1 acme.com -all"
Mail will be accepted for normal(_at_)example(_dot_)com without any issues.
Mail will be accepted for restricted(_at_)example(_dot_)com only if acme.com is 
a
"verified stranger" [MX, SPF, A, +SPF]

So we decide how to proceed based on the RCPT TO address.

The owner of "restricted(_at_)example(_dot_)com" agrees that he/she is gonna 
use that
email address only for "human-to-human" mails when they enable restricted
mode.

While I can warn end users when they enable restricted mode, I can't police
them. What happens when the end user give the address "
restricted(_at_)example(_dot_)com" to a mailing list like ietf and enabled 
restricted
mode? I definitely don't want to send challenge mails to a big mailing
list. That's why I proposed looking for "List-Unsubscribe" headers to
detect non-human mails.

Unlike other C/R based system, we actually send our challenge mails to the
MAIL FROM address. In ietf.org mails, MAIL FROM address is "
ietf-smtp-bounces(_at_)ietf(_dot_)org". So in most cases, our challenge mails 
not
gonna cause any issues.

That breaks one of the big advantages of having a fixed address -
recognizability
by others.  The address I'm using in this email has been in use for at
least 2 decades
now, and allows others to tell that the "me" posting on this list is the
same "me" posting
to a Linux mailing list.
That's why '+' addressing was invented.


You are going to create an isolated mail address only for
website-related-mails. The proper term for "website-related-mails" in our
system is "service-mails". A service is identified via a domain. e.g.
facebook.com

When you give an isolated mail address to a service, generally you don't
care about the issue "recognizability by others". You need this
functionality only in special cases like mailing list, public directory
website etc.


1) Many users will *not* think to create a new address for each mailing
list
before they subscribe.


Only a tiny percentage of email users use mailing list. Our isolated mail
addresses are created for a service domain. IETF has multiple mailing lists
like SMTP, UTA etc. You don't have to create a separate mail address for
each mailing list. You create only one address here which is tied to the
domain ietf.org

Your statement already says few users are okay with that. These few users
are security conscious folks. So the real question is "How can we educate
the rest?"

I have checked your email address "valdis(_dot_)kletnieks(_at_)vt(_dot_)edu" in
haveibeenpwned.com Your email address is already found in 10 breaches. You
either used the same password for all those 10 breached sites or used a
unique password for each site. In the latter case, you relied on a software
to remember passwords.

If creating a unique password seems normal to you, then why not creating a
unique email address seems abnormal? Probably because you don't see the
benefits yet. My paper clearly talks about the benefits of having a unique
email address for each website.

My white paper is a plan for the next 10 years. One cannot change the world
overnight. If you take a look at Everett Rogers's "Diffusion of
innovations" theory, he classified the adopters like: innovators, early
adopters, early majority, late majority and laggards.

He defined them like this.

Innovators:
Innovators are willing to take risks, have the highest social status, have
financial liquidity, are social and have closest contact to scientific
sources and interaction with other innovators. Their risk tolerance allows
them to adopt technologies that may ultimately fail. Financial resources
help absorb these failures.

Early adopters:
These individuals have the highest degree of opinion leadership among the
adopter categories. Early adopters have a higher social status, financial
liquidity, advanced education and are more socially forward than late
adopters. They are more discreet in adoption choices than innovators. They
use judicious choice of adoption to help them maintain a central
communication position.

Early Majority:
They adopt an innovation after a varying degree of time that is
significantly longer than the innovators and early adopters. Early Majority
have above average social status, contact with early adopters and seldom
hold positions of opinion leadership in a system

Late Majority:
They adopt an innovation after the average participant. These individuals
approach an innovation with a high degree of skepticism and after the
majority of society has adopted the innovation. Late Majority are typically
skeptical about an innovation, have below average social status, little
financial liquidity, in contact with others in late majority and early
majority and little opinion leadership.

Laggards:
They are the last to adopt an innovation. Unlike some of the previous
categories, individuals in this category show little to no opinion
leadership. These individuals typically have an aversion to change-agents.
Laggards typically tend to be focused on "traditions", lowest social
status, lowest financial liquidity, oldest among adopters, and in contact
with only family and close friends.

So in the early days, we have to focus only on the Innovators and Early
adopters. They will be probably okay with creating a unique mail address as
long as they see the value. Then we have to improve the user experience to
bring rest of the adopters on board.

1a) Sometimes, it's not directly under the user's control.  For example, I
end
up using the same address for email from Scouting USA National, and from my
local troop (because the troop roster is fed from National's records..)


Restricted mode is an optional feature. You don't have to turn it on. Also
my system supports multiple mailboxes. You can enable restricted mode only
to selected mailboxes.


2) You need to Do The Right Thing if somebody you've never interacted with
does
an off-list reply to a post to a list.


If necessary, We can provide an option like "Allow Off-List Replies" in the
mailbox settings. If enabled, the system would treat non-service mails like
human-to-human mails. e.g. You create a dombox address for ietf.org. The
isolated mail address looks like 
ietf(_dot_)org(_at_)test123(_dot_)example(_dot_)com

ietf.org - The system allows all mails from ietf.org + its alias domains by
default.
When "Allow Off-List Replies" mode is OFF, it reject all other domain mails..
When "Allow Off-List Replies" mode is ON, it treats all other domain mails
just like human-to-human mail. i.e. Sender may have to fill CAPTCHA to
deliver mails.

3) If you want your scheme to work in the real world, it needs to play nice
with browser form autofill.


Page 58 of my paper says,


If the second structure is compatible with 99.99% of the domains, why do we
need the first one? Why not just stick with the second?
Well… We need the first structure to provide good user experience..
Since the first address structure starts with the {Domkey}, we can offer
autocomplete feature.
When a user trying to login to a third party website, instead of typing
the whole
email address like “testkey123$twitter(_dot_)com(_at_)domboxmail(_dot_)com”, 
the user now
can type
“testkey123$” and then press tab.
Our autocomplete feature will behave like this.
Form Email Field => Alphanumeric characters + The dollar symbol + Tab key
press =
capture the current domain and then autocomplete the isolated email address
Although we can add “Autocomplete” feature in subdomain-based structure
too, it won’t
be as good as Dollar-based structure.


I was already focusing on the user experience issues. That's the reason why
we have dollar-based address structures.

Password managers like 1Password offers extensions
<https://chrome.google.com/webstore/detail/1password-extension-deskt/aomjjhallfgjeglblehebfpbcfeobpgk>
for browsers. We can bring such extensions to our system. Password manager
focusing on the "password" field. We are focusing on the "email" field. Our
address structures are not based on random string. It follows a
standardised structure. So you don't have to rely on browser extensions to
remember our email address.

Besides our system already offers two buttons to provide better user
experience. Teleport and Telescribe. Teleport and "SignIn With Apple"
functionality are the same. So Teleport button focus on the user
signups/login without remembering email address and passwords. "Telescribe"
focus on the email newsletter subscriptions.

So... is there actually an architecture or proposal in that 300 page
document,
or is it just a cargo-cult collection of things that people have used in
the
past, to varying levels of success?


This is what you posted 8 months back when I asked for feedback.

*(a) every aspect we could understand from your writing has already been
tried and failed, and (b) you've repeatedly proven that you're totally
unaware of the state of the art on both the spammer side and the
anti-spammer side. Oh, and (c) you appear to be totally unaware of just how
little you know.*


It's been 8 months. Nothing changed much. You still have no idea what's in
my paper. Yet posting insulting comments. I'm surprised that you are coming
from an educational background. "Spray and Pray" is not a quality of a
teacher.

To answer your question, If my words have any value, you would have already
gone though my paper.


And are there any production workload numbers showing that it (a) scales
and
(b) actually gets anywhere closer to "Zero" spam than most providers are
already managing?


I don't have any numbers. But I have an outdated prototype video
<https://www.youtube.com/watch?v=VK2eSfCurx4> which I uploaded last year.
That video may not make any sense unless you read my white paper.

PS: I have gone through the fast-flux technique.

To quote wikipedia, "The basic idea behind Fast flux is to have numerous IP
addresses associated with a single fully qualified domain name, where the
IP addresses are swapped in and out with extremely high frequency, through
changing DNS records".

Since my system is a domain-based reputation system, fresh domains will be
rate limited. Aged domains probably will be blacklisted quickly in the
fast-flux technique.

On Mon, Sep 30, 2019 at 3:47 AM Valdis Klētnieks 
<valdis(_dot_)kletnieks(_at_)vt(_dot_)edu>
wrote:

On Sun, 29 Sep 2019 11:27:15 +0530, Viruthagiri Thirumavalavan said:

You are talking about bulk mailing here. Our "injection" phase is not
designed for bulk mails. That's why we throw this warning when the user
enabled restricted mode.

So how does your system classify this email you're reading right now?

Is it spam, or bulk mail, or something the user wanted?

I want them to create an isolated mail address which would look like
ietf(_dot_)org(_at_)test123(_dot_)example(_dot_)com and then give this 
address while signing
up to
ietf mailing list.

That breaks one of the big advantages of having a fixed address -
recognizability
by others.  The address I'm using in this email has been in use for at
least 2 decades
now, and allows others to tell that the "me" posting on this list is the
same "me" posting
to a Linux mailing list.

That's why '+' addressing was invented.

A few user experience issues:

1) Many users will *not* think to create a new address for each mailing
list
before they subscribe.

1a) Sometimes, it's not directly under the user's control.  For example, I
end
up using the same address for email from Scouting USA National, and from my
local troop (because the troop roster is fed from National's records..)

2) You need to Do The Right Thing if somebody you've never interacted with
does
an off-list reply to a post to a list.

3) If you want your scheme to work in the real world, it needs to play nice
with browser form autofill.

So... is there actually an architecture or proposal in that 300 page
document,
or is it just a cargo-cult collection of things that people have used in
the
past, to varying levels of success?

And are there any production workload numbers showing that it (a) scales
and
(b) actually gets anywhere closer to "Zero" spam than most providers are
already managing?



-- 
Best Regards,

Viruthagiri Thirumavalavan
Dombox, Inc.
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