On 09/04/07, Marc Perkel <marc@???> wrote: >
>
> Paul Johnson wrote:
> > Marc Perkel wrote in Article <460C04B6.70102@???> posted to
> > gmane.mail.exim.user:
> >
> >
> >> Just one quick question. Do domain keys break email forwarding the way
> >> SPF does?
> >>
> >
> > SPF doesn't break forwarding if you implement SRS...
> >
>
>
> SPF breaks email forwarding in that other people who don't implement it
> can't forward to you. SPF is a useless broken technology.
Another correction: SPF is a good technology, as long as the
implementor is aware of its limitations. Its use for refusing mail is
subject to the SRS/forwarding restriction. Its use for driving
reputation-based whitelists suffers a little in its accuracy (on the
right side) because of that issue (ie some forwarded mail doesn't hit
the whitelist), but that doesn't stop it being very useful.
