Re: [dmarc-ietf] Reversing modifications from mailing lists

[Scott Kitterman]

On November 30, 2021 5:30:39 PM UTC, John R Levine <jo...@taugh.com> wrote:
>On Tue, 30 Nov 2021, Wei Chuang wrote:
>> What about adding a footer to some html mime part is poorly handled when
>> using "l="?  Multipart bodies could be handled by other techniques.
>
>See section 8.2 in the DKIM spec which says if you use l= you need to be 
>careful with your MIME boundaries so naughty people can't add another part 
>that overlays the real message.
>
>I have seen lists that edit the footer into the HTML of the body, I think 
>at Yahoo groups.  Don't see how you're going to describe that in a 
>reversible way.

Or, we could stop trying to design a DKIM replacement and work on DMARC.

Scott K

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