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On Thu, 6 Feb 2014, Robert Schetterer wrote:
Am 06.02.2014 10:41, schrieb Tim Dickson:
Very useful blocking filter, many thanks.
Does it generate backscatter.?
No , should reject at smtp income data stage, but look
^^ I would say "must" in order to avoid backscatter.
As soon as you've accepted the message, you must generate a bounce.
http://www.postfix.org/header_checks.5.html
for more info
I have come across a number of spam emails which have more than one
address in the from field. Would this filter send the spam to those
If you reject at SMTP transmission time, no bounce is generated at all,
but a negative SMTP reply code.
addresses by way of a mail bounce.?
The "From" header of a message is not consulted, when the bounce message
is generated. Bounces are sent to the envelope sender, either passed by
the MTA or taken from the Return-Path header.
- --
Steffen Kaiser
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