[Baypiggies] Challenge/Response email systems

[steve hindle]

On 6/16/06, Ken Seehart <ken at seehart.com> wrote:
>
>  4. Is there anything as bulletproof as CR, but without the problems?  And I
> am not asking about
>  better filters (that's just an ongoing battle against better spam).
>

I know the 'designated sender' system(s?) were causing a stir a while back...
I forget the acroynm but I believe it worked by adding DNS records
indicating which mail servers were 'authorized' to originate mail for
a particular domain.  I believe AOL was backing/implementing a version
of it.  Don't know what the outcome was, but I sure someone on the
list can shed more light on it.

Steve