Am 26.03.2015 um 15:55 schrieb Reindl Harald: > > Am 26.03.2015 um 15:52 schrieb Antony Stone: >> On Thursday 26 March 2015 at 15:45:07 (EU time), Reindl Harald wrote: >> >>> Delivery to the following recipient failed permanently: >>> >>> ad...@rhsoft.net >>> >>> Technical details of permanent failure: >>> Google tried to deliver your message, but it was rejected by the server >>> for the recipient domain rhsoft.net by mail-gw.thelounge.net. >>> [91.118.73.19]. >>> >>> The error that the other server returned was: >>> 550 5.7.1 Blocked by Spamfilter, please forward this to YOUR >>> tech-support first, time: Mar 26 15:22:51, client: 209.85.223.177, >>> server: mail-gw.thelounge.net, contact: <postmas...@thelounge.net> >>> +4315953999 >> >> Surely this message is backscatter, though? >> >> It's being sent to the (apparent) sender, in response to a message >> which you >> know is identified as spam > > NOT IT IS NOT A BACKSCATTER - "Google tried to deliver your message" > that is NOT the apparent sender - it IS the sender > > it is sent from GOOGLE to my GMAIL account as RESPONSE to the reject > a backscatter would have been when my mailserver hd sent the bounce >
Harald is very unfriendly sometimes , but he is right 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, milter are running as before-queue ! typical milters are spamass-milter, clamav-milter amavis-milter youre right it may not optimal with more recipients "sometimes" but good enough in real world, also you may combine it with any other after-queue content filter backscatter would mean accept the mail and bounce it back later to i.e a forged sender study http://www.postfix.org/MILTER_README.html http://www.postfix.org/FILTER_README.html http://www.postfix.org/BACKSCATTER_README.html 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
