Am 16.05.2014 21:24, schrieb Rick Romero:
Quoting Oscar del Rio <delrio@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.
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...
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
dont expect coders focus to broken setups
Best Regards MfG Robert Schetterer
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