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[spf-discuss] Re: RFC 4408 <draft-schlitt-spf-classic-02.txt> -- AUTH48 changes

2006-03-31 01:33:43
Last minute changes:

== proposed ==
   domain-end       = ( "." toplabel [ "." ] ) / macro-expand
== original ==
   domain-end       = ( "." toplabel ) / macro-expand
==============
Two occurences (9.1 and collected ABNF).  This introduces an
unnecessary incompatibility with an unknown number of existing
SPF and SenderID implementations, for an example see
<http://permalink.gmane.org/gmane.mail.spam.spf.discuss/20813>

Therefore I recommend to disregard this proposal, or get a 3rd
opinion from John C. Klensin, the author of RFC 2821 and 3696.

== proposed ==
   toplabel         = ALPHA / ALPHA *[ alphanum / "-" ] alphanum
                      ; LDH rule (See [RFC3696])
== original ==
   toplabel         = <TLD label as per [RFC3696], Section 2>
                      ; LDH rule plus additional TLD restrictions
==============
This prose specification is rather clumsy.  RFC 3696 is an
informational RFC, not suited for a normative reference.  The
intention is okay, but at this time there exists no RFC with a
proper ABNF for the "not only digits" LDH rule for toplabels.

See draft-ietf-usefor-usefor-07 for a first attempt in this
direction.

All other proposed changes appear to be okay - especially the
points about different policies found in SPF and TXT records
caused by DNS caching.
                       Regards, F.Ellermann


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