> On 21 Jul 2020, at 02:33, Dave Crocker <dcroc...@gmail.com> wrote:
> 
> On 7/20/2020 6:18 PM, Murray S. Kucherawy wrote:
>> I'm not sure we've ever fully faced the idea that what MUAs choose to 
>> display needs to be factored into the evolution of these protocols.  For as 
>> long as I've been working on this, it's been the opposite.
> 
> 
> Although various people keep citing affecting display based on dmarc, that's 
> never been the essence of its motivation.  Which is good, because users are 
> not affected by trust indicators. Really.  Not.

I agree users are not affected by trust indicators (although see the ..pdf that 
I linked to in an earlier email that says they are). But I would argue that 
much of the marketing and justification around DMARC has been around end users 
and improving their trust in brands and protecting them from phishing. 

> 
> It's entirely reasonable to start with the idea that it might (or should) 
> help end-user evaluation, but human factors don't serve the master of that 
> kind of logic. To date, online experience is that users are essentially 
> impervious to trust indicators.(*)
> 
> Rather, DMARC serves to provide some clean data to the receiving filtering 
> engine, which is the only venue that matters for email safety.  (Well, and 
> originating filtering engines, of course.) Not the MUA.

That is not how I’ve seen DMARC being sold. Most of the marketing I’ve seen 
about DMARC is all about user experience and the user being able to trust mail 
is “from who it claims to be from.” And now people are explicitly layering on 
another protocol that is all about what the user sees in the MUA. 

laura

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Laura Atkins
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