I'm confused.

I thought we all agreed that From represents the author who is responsible for 
the content, and consequently it had importance to both the filtering process 
and the user.   I thought the issue at hand was that DMARC-induced header 
munging made the From address into something different then the address which 
best represents the author.   So it seemed like we had a lot to agree on.

Also, I thought a trust indicator was a statement like
"The From Address is DMARC-verified",
rather than
"This message is from user@domain"

Which leads me to several questions
- Does the research support the idea that the From address is a trust indicator?
- Is so, does it show that the only purpose of the From address is as a trust 
indicator?
- If "From" has purposes other than as a trust indicator, does it matter 
whether the value is correct or not?
- If it is true that the From address serves no purpose to the user, then is 
header munging really a problem?

DF

----------------------------------------

From: Dave Crocker <[email protected]>
Sent: 9/27/20 1:26 PM
To: [email protected]
Subject: Re: [dmarc-ietf] Call for Adoption: DMARC Use of the RFC5322.Sender 
Header Field

On 9/27/2020 10:16 AM, John Levine wrote:
> I suppose both are right to some extent, but they have very different
> implications for the design.

Except they aren't both right.

We know that it is used by filtering engines.

There is no evidence it is used by end-users. And there is a pretty long
history indicating such information is NOT used by end users.

d/

--
Dave Crocker
Brandenburg InternetWorking
bbiw.net

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