--Jim Lyon <jimlyon(_at_)exchange(_dot_)microsoft(_dot_)com> wrote:
5.1.5 "exists" element
Attributes: None
Child Elements: None
Character Data: A domain name, with macro expansion.
This element matches iff the domain given by the character data
(after macro expansion) exists in DNS. If the DNS lookup fails for
any reason other than nonexistence, the client authorization function
returns "unknown".
This should be clarified as to what type of lookup needs to be done. I
believe the current SPF spec says this should be an A record (to make it
similar to how an RBL works). The wording in this draft might be
understood to mean an ANY query should be done, but I'm not sure that's
what is intended... if it is, that should be clarified.
--
Greg Connor <gconnor(_at_)nekodojo(_dot_)org>