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

Agreed.  I don't think this is controversial.

Also, I don't see a problem with making the p= tag optional (with an inferred 
value of None if not present).  This is consistent with an existing SHOULD in 
RFC 7489 and appears to be broadly supported in existing implementations.

I'd propose we close this ticket with the following resolution:

The requirement that the v=DMARC1 tag be first will be retained.

The requirement that the p= tag be second and the requirement that the p= tag 
is mandatory will be dropped.  If the p= tag is not present, the implied 
policy value is None.

Scott K

On Thursday, May 21, 2020 4:54:55 PM EDT Tim Wicinski wrote:
> (With no hats)
> 
> I agree with John the v=DMARC1; is magic and MUST be first.  Everything
> else can show up wherever.
> 
> tim
> 
> On Fri, May 15, 2020 at 9:09 PM John Levine <johnl@taugh.com> wrote:
> > In article <CAL0qLwa-iuyB_iNQU+g6e3NH1+q0W413RaCZcHp==
> > s9CQA7s1g@mail.gmail.com>,
> > 
> > Murray S. Kucherawy  <superuser@gmail.com> wrote:
> > >It's been a while since the original discussion, but I can't remember why
> > >the requirement is there in the first place.  The only benefit I can
> > >think
> > >of is that having "v=" first lets you decide very quickly if you care to
> > >continue, but the savings is really pretty small.
> > 
> > The v=DMARC1; is a magic number that tells you whether it's worth decoding
> > the
> > rest of the record.  People put a lot of junk at tops of their zones, some
> > of which is in k=v format and I would prefer not to try to decode records
> > full
> > of junk to see of a v= tag is in there somewhere.
> > 
> > Other than that I agree there is no reason to specify the order of
> > tags.
> > 
> > --
> > Regards,
> > John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for
> > Dummies",
> > Please consider the environment before reading this e-mail. https://jl.ly
> > 
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