Re: Re: SPF is not usable as legal measure against spammers

Lloyd Zusman wrote:

> Out of curiosity: how many "end" domain components are tested?  Clearly,
> it must be more than one, or else any one that ends in ".com" would
> match.
As many as given in the 'ptr' mechanism. See also section 6.1 of the
specification.

> What if the two domains being compared both end in ".co.uk",
> such as these?
>
>    foo.co.uk
>    bar.co.uk
"ptr:foo.co.uk" matches only foo.co.uk, whereas "ptr:co.uk and "ptr:uk"
match both (provided the A record points back to the IP address).

Roger