On 06.06.19 00:59, MarcelM wrote:
Ahh... I see. So probably other headers are modified by the mail server as
well, and that is why SA's SPF check fails!

this is probably SPF check for ampel-24.de which fails when forwarded
locally.

as you can see, amazon SPF succeeds:

Received: from a1-14.smtp-out.eu-west-1.amazonses.com 
(a1-14.smtp-out.eu-west-1.amazonses.com [54.240.1.14])
   by ampel24.de (Postfix) with ESMTPS id 2A2441CD89929
   for <marketpl...@ampel-24.de>; Wed,  5 Jun 2019 14:00:35 +0200 (CEST)
Authentication-Results: ampel24.de;
   spf=pass (sender IP is 54.240.1.14) 
smtp.mailfrom=201906051200349bb96326a7864e6eb55a703df7c0p...@bounces.amazon.de 
smtp.helo=a1-14.smtp-out.eu-west-1.amazonses.com

however, the sender is rewritten to 
<SRS0=X/MR=UE=bounces.amazon.de=201906051200349bb96326a7864e6eb55a703df7c0p...@ampel-24.de>
which seems to cause SPF fail, because mail was received from amazon.

Why would it do that ? I will read up on that.

the SRS itself is OK, but apparently should be used after mail leaves
the server.

I have to think about this a bit more.


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