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Re: [dmarc-ietf] DMARC bis: ticket 51: disposition reporting in aggregate reports

Seth Blank <seth@valimail.com> Wed, 30 September 2020 15:12 UTC

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From: Seth Blank <seth@valimail.com>
Date: Wed, 30 Sep 2020 08:12:08 -0700
Message-ID: <CAOZAAfO4sGsrnZgotKnGBpwkjOXOjQBgAshroqoD+hiNksVeng@mail.gmail.com>
To: "Kurt Andersen (b)" <kboth@drkurt.com>
Cc: Dave Crocker <dcrocker@bbiw.net>, "dmarc@ietf.org" <dmarc@ietf.org>
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Subject: Re: [dmarc-ietf] DMARC bis: ticket 51: disposition reporting in aggregate reports
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On Wed, Sep 30, 2020 at 8:01 AM Kurt Andersen (b) <kboth@drkurt.com> wrote:

> On Tue, Sep 29, 2020 at 3:50 PM Dave Crocker <dhc@dcrocker.net> wrote:
>
>> On 9/29/2020 3:08 PM, Seth Blank wrote:
>> > I don't know of any receiver that checks DMARC, but then doesn't check
>> > alignment
>>
>> It's not a matter of field statistics:
>>
>>       Since checking alignment is an obvious part of the DMARC
>> procedure, if someone does not follow the specification, they are not
>> doing DMARC.
>>
>
> Does that mean that "none" is not an appropriate verdict?
>

No, per https://tools.ietf.org/html/rfc7489#appendix-C "none" is the only
option for when a policy action is not undertaken:

   <!-- The policy actions specified by p and sp in the
        DMARC record. -->
   <xs:simpleType name="DispositionType">
     <xs:restriction base="xs:string">
       <xs:enumeration value="none"/>
       <xs:enumeration value="quarantine"/>
       <xs:enumeration value="reject"/>
     </xs:restriction>
   </xs:simpleType>

The point of this thread, and where consensus appears to lie, is adding
another value to disambiguate the use cases.


> --Kurt
>


-- 

*Seth Blank* | VP, Standards and New Technologies
*e:* seth@valimail.com
*p:* 415.273.8818


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