That is configurable since mailman 2.1.18. Details:
https://wiki.list.org/DEV/DMARC

On Mon, Jun 20, 2022 at 11:22 AM Jaroslaw Rafa via mailop <mailop@mailop.org>
wrote:

> Dnia 20.06.2022 o godz. 20:05:37 Jaroslaw Rafa via mailop pisze:
> > > Mailing lists can operate minimal changes, like this list does, for
> example.
> > > I received your message with "From: Jaroslaw Rafa <r...@rafa.eu.org>"
> after
> > > my filter verified that your DKIM signature still validates upon
> undoing
> > > their changes.
> >
> > If my domain had DMARC record with p=reject instead of p=none, you would
> > receive a message with:
> > "From: Jaroslaw Rafa via mailop <mailop@mailop.org>". You can find a
> lot of
> > such examples in the messages from other people on this list. Other
> mailing
> > lists perform similar rewriting.
>
> Well, looks like I didn't look at the headers actually :) This list
> rewrites
> "From:" address to the above form even that I don't have p=reject. It
> actually seems to rewrite all sender addresses...
>
> So you must use some special filtering in your MUA to see my message as
> "From: Jaroslaw Rafa <r...@rafa.eu.org>", because it just doesn't look so.
> I
> don't want to talk here about specific home-crafted solutions that revert
> changes made by mailing lists. I want to talk just about ordinary,
> "out-of-the-box" MUAs and MTAs.
> --
> Regards,
>    Jaroslaw Rafa
>    r...@rafa.eu.org
> --
> "In a million years, when kids go to school, they're gonna know: once there
> was a Hushpuppy, and she lived with her daddy in the Bathtub."
> _______________________________________________
> mailop mailing list
> mailop@mailop.org
> https://list.mailop.org/listinfo/mailop
>


-- 
===============================================
Russell Clemings
<russ...@clemings.com>
===============================================
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