Am 16.05.2014 21:24, schrieb Rick Romero: > Quoting Oscar del Rio <del...@mie.utoronto.ca>: > >> On 05/13/14 03:02 PM, Stephan Bosch wrote: >>> Use of NULL envelope sender is generally recommended to prevent mail >>> loops >> >> Unfortunately, many servers out there reject emails with NULL sender. >> Some recent examples (real server names edited) : > > Any domain hosted by RackSpace will reject a NULL sender for > 'backscatter'. > > Bascially, 'backscatter' blockers assume all edge SMTP servers will have > complete knowledge of the final delivery status - during the SMTP > conversation - thus labeling all NULL senders as forged spam redirected to > them via a bounce message. > > http://www.backscatterer.org/
this use of this rbl is widly broken, dont do it, unless you have fully understand what you do > > Rick however if you want to change Return-Path use http://wiki2.dovecot.org/Pigeonhole/Sieve/Plugins/Extprograms http://hg.rename-it.nl/pigeonhole-0.3-sieve-extprograms/raw-file/tip/doc/rfc/spec-bosch-sieve-extprograms.txt with procmail/formail this also might give you the chance to prefilter only do changes to broken mail domain setups you might also write some milter/policy server for submission host etc and/or poke around with some SRS Solution http://www.openspf.org/SRS dont expect coders focus to broken setups 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
