On 3/26/2015 11:11 AM, Robert Schetterer wrote:
This argument to me assumes that their isn't a server in the middle of the relay. Not everything is edge to edge, point A to B. Lots of backscatter comes from attacking secondary MX's and just because you 5xx doesn't mean it doesn't cause backscatter.what he describes is not backscatter, cause the mail is rejected during smtp imcome stage, wich means the server simply didnt take the mail during the running smtp session,
Regards, KAM
