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Re: [Bimi] Proposal to Clarify Role of MUA in BIMI Evaluation

Richard Clayton <richard@highwayman.com> Wed, 20 July 2022 12:54 UTC

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Date: Wed, 20 Jul 2022 13:52:54 +0100
To: "bimi@ietf.org" <bimi@ietf.org>
From: Richard Clayton <richard@highwayman.com>
References: <DE61AC51-4BC3-44FF-862D-7D8ADFB3BC29@proofpoint.com> <20CBD506-7E50-4161-ADE6-64614630B1B2@proofpoint.com> <CAHej_8kridbc322MDRpxfgd+8Y2yNacxTAtvr+HF=+wevdRQhw@mail.gmail.com> <VI1PR01MB70538965904FD08A49F75C37C78C9@VI1PR01MB7053.eurprd01.prod.exchangelabs.com> <11A2B052-A26C-4A9C-9D88-72B594DA1C59@proofpoint.com> <VI1PR01MB70537BA29DA1F456B858C17FC78C9@VI1PR01MB7053.eurprd01.prod.exchangelabs.com> <6993E8B6-11A0-4AF3-A94E-044F880E56BC@proofpoint.com> <CAHej_8kjwtGE4rDrXfTpgThOD-jh7t0GK9EUnVjVZT_OJzzsvg@mail.gmail.com> <VI1PR01MB705353E36328899609DE2471C78C9@VI1PR01MB7053.eurprd01.prod.exchangelabs.com> <12a85dfe-664f-d757-0fa2-81f17c8088c2@dcrocker.net> <4e9ab94e-8675-df70-3e4b-00edcedb266e@dcrocker.net> <5DE65D46-853F-4F61-ADA7-20CB5E7E6840@kitterman.com> <7f030278-3f9b-c8ea-f9eb-644f006cded9@dcrocker.net> <CC11EF68-1E27-41CD-AE2D-AC26DA261EAD@kitterman.com> <CAHej_8mNCTw0LpnWTBCpqZJhHQcDgrsC4truK1dD_-HbyVgsWA@mail.gmail.com> <DM8PR14MB5237459AC795AE826FDDA198838F9@DM8PR14MB5237.namprd14.prod.outlook.com> <qnuJf0TDr11iFAcB@highwayman.com> <CAHej_8kySKk4_F3eVDRQU4ABjs3JUg4Z9UipTwGJE2nSJQ5SJA@mail.gmail.com>
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Subject: Re: [Bimi] Proposal to Clarify Role of MUA in BIMI Evaluation
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In message <CAHej_8kySKk4_F3eVDRQU4ABjs3JUg4Z9UipTwGJE2nSJQ5SJA@mail.gma
il.com>, Todd Herr <todd.herr=40valimail.com@dmarc.ietf.org> writes

>    I'm not clear on what you mean by the phrase "magically available 
>    for fetching" here.
>
>    The current draft of the BIMI specification describes a "BIMI 
>    Assertion Record" (
>    https://datatracker.ietf.org/doc/html/draft-brand-indicators-for-message-identification#section-4.2
>    ) as a relatively straightforward DNS TXT record, one making use of 
>    a tag-value syntax, not unlike a DMARC policy record.

Exactly ... it requires the DNS record to still exist and short of magic
I know of no way to achieve that for ancient email.

Recall that just two days ago you were discussing a "real-world
scenario" involving changing phone and your mail client being faced with
9GB of stored email

     How many messages should the Mail client try to do BIMI validation
     on before the battery on my phone is exhausted and/or the iPhone
     becomes a smoldering pile of melted plastic and silicon?

the answer to the question BTW would be "as many as were about to be
displayed" (since the only value of BIMI is to provide images and if an
email falls into the forest of the far reaches of your inbox it won't
just make no sound, but it won't display an image either!)

- -- 
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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