On Tue, 2020-02-11 at 11:34 +0100, Alessandro Vesely via mailop wrote:
> On Sun 09/Feb/2020 00:33:34 +0100 Simon Lyall via mailop wrote:
> > On Sat, 8 Feb 2020, Aragon Gouveia via mailop wrote:
> > > Does anyone know why this list breaks DKIM verification?  In particular it
> > > looks like it's altering From, Reply-To, and Cc headers, and failing to
> > > perform any kind of resigning too.
> > 
> > Changing the From (and other headers) needs to be done by the mailing list. 
> > If
> > we [don't] change the From then the list will be blocked for SPF failures.
> 
> That's not exact.  SPF uses the envelope from.  The From: header field has to
> be changed because of DMARC.

The list could also add a sig which would add a lot of value, but that's
probably already known.  There is no easy panacea for mailinglists to
responsibly reflect email without disrupting DKIM and therefore DMARC.

-Jim P.  


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