Am 26.03.2015 um 16:19 schrieb Kevin A. McGrail: > On 3/26/2015 11:11 AM, Robert Schetterer wrote: >> 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, > 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. > > Regards, > KAM
whats the problem, you only need to take care of your mailservers are working the right way, for sure gateways make things more difficult but not unsolvable Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein
