On Fri, 07 Oct 2011 20:47:48 +0100 Martin Gregorie <mar...@gregorie.org> wrote:
> And, at least for me, its been good for suppressing backscatter: since > I've had a good SPF record I've has almost none. Really?? You are very lucky. We have an SPF record with a "-all" clause and still get backscatter. I believe that so few SMTP servers validate SPF that the amount of backscatter it actually reduces is tiny. Regards, David.
