Re: [exim-dev] DMARC ARC

On 18/10/16 15:11, Andrew C Aitchison wrote:
> On Tue, 11 Oct 2016, Jeremy Harris wrote:
>> I'll modify that. It's a mailinglist thing as regards generation;
>
> Does "mailinglist" include forwarding ?

No.

> If so exim might want to generate too.
>
>> but the final receiving MTA wants a checking implementation.
>>
>> The latter is where Exim might want to provide support.
>
> Is ARC an all or nothing, or is it a scoring thing
> that could be done by spamassassin ?

AFAIR it's a one-bit result - but you could obviously
feed that one bit into SA.

> I note that section 10 warns that ARC could be mis-used
> to force the checking server to make many DNS requests.
> Perhaps a configurable limit should be included in the
> implementation ?

Entirely possibly - but for the avoidance of doubt I'm
not planning an implementation at present myself.
--
Cheers,
Jeremy