On Thu, 22 Mar 2012 13:55:50 +0000 Martin Gregorie <mar...@gregorie.org> wrote:
> > Disagreed. I don't believe SPF has cut backscatter down by > > more than a few percentage points. > YMMV of course, but it worked for me: when I put up an SPF record > backscatter, which had been a problem at the time, was dramatically > reduced. Hmm... OK. I may have been hasty. Assuming that the large providers like Google, Hotmail, and Yahoo reject SPF-failing mail during the SMTP transaction, I can see it making a measurable difference. I still stand by my opinions about the lack of competence of most Microsoft Exchange admins, though. :) Regards, David.
