On 5/04/2017, at 2:21 PM, Damian Kissick <me@damo.net.nz> wrote:

Personally the only thing I really find of use in my mail stack is grey listing, for stopping spam. I've just about stripped the rest out and just let people deal with the noise as they see fit.

I'm actually surprised you are finding greylisting still useful.

Our experience matches Don��s. We are still finding greylisting the most effective tool in dealing with spam. I agree that it may not continue to be so but I haven��t seen anything yet that we might use instead.