Quick follow-up:
I just looked at my scans for duplicates and found 8670 domain names with
duplicates (0.007% of total DMARC records)
'dmarc-srequest': 5551
'dmarc-request': 1651
'dmarc-auri': 657
'dmarc-aspf': 292
'dmarc-percent': 174
'dmarc-furi': 129
'dmarc-fo': 95
'dmarc-ainterval': 59
'dmarc-rfmt': 36
'dmarc-adkim': 26
Looking quickly at the records that fail the analysis, 5339 have the same
record and seem to belong to the same organization (contacted) that offers
email services.
The records failing the semantical analysis contain an additional
'dmarc-srequest' ('sp=none').
I do not know if this kind of data is relevant for this mailing list. If not,
please let me know.
Regards,
Olivier Hureau
De: "Alessandro Vesely" <[email protected]>
À: "dmarc" <[email protected]>
Envoyé: Mardi 25 Juillet 2023 13:39:17
Objet: Re: [dmarc-ietf] What happens when the DMARC record contains two
identical tags?
On Mon 24/Jul/2023 18:17:10 +0200 Murray S. Kucherawy wrote:
> On Mon, Jul 24, 2023 at 9:13 AM OLIVIER HUREAU
> <[email protected]> wrote:
>
>>> If you want more than just the ABNF to defend that position, have a
>>> look at the DKIM RFC, from which this syntax was cloned; it says:
>>
>> Then wouldn't it make sense to add this specification to DMARC-bis?
>
> Can't hurt.
+1, the reference in Section 5.3 is a bit vague. For a possible expansion:
OLD
DMARC records follow the extensible "tag-value" syntax for DNS-based key
records defined in DKIM [RFC6376].
NEW
DMARC records follow the extensible "tag-value" syntax for DNS-based key
records defined in DKIM [Section 3.2 of RFC6376], which defines parser behavior
when tags are unrecognized, repeated, case-sensitive and the like.
jm2c
Ale
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