[fdo] PSA: Google dropping a lot of list email

[Daniel Stone]

Hi James,

On Mon, 11 Feb 2019 at 19:32, James Cloos <cloos at jhcloos.com> wrote:
> >>>>> "DS" == Daniel Stone <daniel at fooishbar.org> writes:
>
> DS> The immediate cause is sending on mail from
> DS> domains with SPF/DKIM/DMARC policies which explicitly specify that
> DS> lists.fd.o cannot relay mail on their behalf.
>
> Mailman has an option to rewrite the From: headers for such domains.
> In particular, the 'Munge From' dmarc_moderation_action.
>
> Cf: https://wiki.list.org/DEV/DMARC

That's currently what I've done: we should now be stripping DKIM
signatures, as well as munging the From address (which I've tried to
avoid for the longest time, but, well ...) when there's any DMARC
policy at all on the domain.

We are seeing hard rejects from Google even when the DMARC policy is
explicitly p=none (i.e. summarise/advise but do not quarantine or
reject), so it seems we need to apply this everywhere. :(

Cheers,
Daniel