On 6/25/20 8:17 AM, Dave Crocker wrote:
> On 6/24/2020 12:24 PM, Jim Fenton wrote:
>> You have explained why Sender: is better than From: (which I agree with)
>> but not why specifically Sender needs to be used.
>
> Existing practice is less risky than new practice.  The existence and
> semantics of Sender: has been around for 45 years.  Its semantics
> match what is
>
>
>> I see the use of a
>> long-standing header field as being a disadvantage, not an advantage,
>> because of potential obscure uses we don't know about.
>
> That line of logic means we should never modify or add to any existing
> practice.
>
We disagree. But I suggest we not bikeshed this any further until the WG
reaches rough consensus on whether DMARC binding specifically with the
From: domain is essential. Then we can decide what the "color" of the
header field should be.

-Jim

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