[dmarc-ietf] DMARC bis: ticket 49: remove normative requirement on policy tag placement

[Seth Blank <[e-mail]>]

https://trac.ietf.org/trac/dmarc/ticket/49

The penultimate paragraph of https://tools.ietf.org/html/rfc7489#section-6.3
 states:

the "v" and "p" tags MUST be present and MUST
   appear in that order.

While the v= tag pretty universally appears first, the p= tag does not in
many records, and no implementation appears to care.

The v= tag must appear first, or the policy discovery mechanism as defined
in https://tools.ietf.org/html/rfc7489#section-6.6.3 would break.

But there doesn't appear to be any real reason to keep the normative
requirement that the p= tag MUST be second in the record after the v= tag,
nor does this requirement seem to have any impact on interoperability or
general record parsing in theory or in practice.

Should we remove this normative requirement?

-- 

*Seth Blank* | VP, Standards and New Technologies
*e:* [e-mail]
*p:* 415.273.8818



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