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[ietf-clear] Re: Make CSV backwards compatible with legacy SPF records?

2004-11-18 19:03:12
Douglas Otis wrote:

Providing an identifier for a machine is a different function than an
identifier for a mailbox-domain.  Even mapping these identifiers from
the machine to the mailbox-domain is a challenge.  AOL adds two
sub-domains to the root domain, as example.  Finding the zone-cut
becomes a factor when even attempting to trace accountable entities. 
One can not rely upon a wild-card SPF record, as these are intended to
provide a denial that the label is valid for a mailbox-domain. : (

so the problem is that in HELO web101.mail.yahoo.com, its 
hard/impossible to determine that we should look up yahoo.com?

miles