On Thu, Oct 6, 2011 at 3:09 PM, David F. Skoll <d...@roaringpenguin.com>wrote:
> On 7 Oct 2011 00:28:49 -0000 > "John Levine" <jo...@taugh.com> wrote: > > > >Does anyone blacklist based on SPF? > > > Nobody with any interest in delivering the mail that their users want. > > The error rate is much, much too high. > > It depends. I very confidently blacklist mail from "roaringpenguin.com" > that fails to pass SPF. That's my own domain, of course. > > With somewhat less (but still pretty high) confidence, I block mail > from paypal.com and ebay.com if it fails SPF (including "softfail") > > SPF is most effective when used judiciously for specific domains. It's > pretty useless to make blanket SPF rules that cover unknown domains. > > What do your rules look like for this scenario? Julian
