Can SPF identify wildcard domain forgery?

Shelby wrote:

> My question below boils down to: "is there a syntax for SPF (possibly the
> macro language?) which enables "-all" to be excluded from only some
> address of a domain?"
Yes, this can be done by the 'exists' mechanism:

v=spf1 exists:%(L).spf.example.com -all"

(With the 'exists' mechanism and a custom DNS server you can do any test you
want to do with the information you have at SMTP time.)

Roger