Re: Re: Problems with spf testsuite and dns specification

On Monday 18 June 2007 04:57, Julian Mehnle wrote:
> Scott Kitterman wrote:
> > On Sunday 17 June 2007 04:18, Julian Mehnle wrote:
> > > Scott Kitterman wrote:
> > > > [...]  If someone want to do an errata to say multiple <b>
> > > > non-identical </b> records, I'm all for it.  There can be no harm in
> > > > multiple records that are identical, it generates no ambiguity.
> > >
> > > This _might_ have been the best resolution 2-3 years ago.  However,
> > > now we cannot do that anymore, as it would require implementations to
> > > check for whether multiple records are identical or not.  And grafting
> > > this onto RFC 4408 with a "SHOULD" (i.e. not strictly requiring the
> > > new behavior) wouldn't solve the problem at hand.
> >
> > OK.  How about MUST Permerror on multiple SPF records, except
> > implementations MAY treat multiple identical records as a single record?
>
> I think we could do that.
>
> But this would still just make the inconclusive interpretation of the spec
> explicit, and leave the problem to be fixed in the test suite.

Yes, but if we have an errata to allow this behavior then there's nothing to 
argue about the test suite, it just needs to be updated.  It is an 
inconsistency, but given that DNS may compact the duplicate records to a 
single record, the inconsistency already exists.  This just makes it more 
obvious.

Scott K

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