Re: [dispatch] De-munging mailing list messages

[John Levine <[e-mail]>]

It appears that Alessandro Vesely  <[e-mail]> said:
>Hi,
>
>there still seems to be qualms about making full use of DMARC.  Part of them, I 
>feel, are related to mailing lists.  All mailing lists I know have finally 
>enabled From: munging.  But is it an annoyance for list participants to receive 
>munged messages?
>
>If a list saves the pristine value of From:, receivers can then restore it. 
>That's the reason why RFC9057 introduces the Author: header field.
>
>Would this list experiment adding Author: fields?
>Would participants set up local MDA filters to restore From: based on that?
>
>I asked these questions to dmarc list, but they're fed up with the topic of 
>indirect mail flows, which they dealt with specifying ARC.  They are now beyond 
>that phase, consider de-munging off topic, and suggested to ask here.
>
>I tried and collected ideas on how to set up de-munging in the "simple method" 
>of my draft:
>https://datatracker.ietf.org/doc/html/draft-vesely-dmarc-mlm-transform
>
>(The draft also describes a "complex" method, which can be enabled by a 
>recipient without coordinating with a ML.  It works ~50% of cases only.)

This was not a good idea with Ale proposed it in the DMARC WG, and it's not a good idea now.

It breaks RFC 5322 and does not solve the actual DMARC vs. lists problem that ARC addresses.

R's,
John