Am 26.07.2015 um 03:04 schrieb Alex:
> Hi,
> 
> I have a postfix-2.10.5 server on fedora, and have several users that
> forward their mail through to gmail. This is apparently enough to
> break SPF and make gmail think I'm the originator of the email,
> instead of the actual sender. Consequently, gmail considers it spam
> and moves it to a spam folder.
> 
> Is there anything I can do, including somehow rewriting the email, to
> get gmail (and others, for that matter) to accept these forwarded
> emails without considering them spam?
> 
> Can they be rewritten using our SPF information, somehow?
> 
> I've included the header (modified user/IP addresses) in case it's helpful.
> 
> Delivered-To: origu...@gmail.com
> Received: by 10.13.203.214 with SMTP id n205csp587551ywd;
>         Sat, 25 Jul 2015 06:39:29 -0700 (PDT)
> X-Received: by 10.55.25.131 with SMTP id 3mr28553330qkz.85.1437831569919;
>         Sat, 25 Jul 2015 06:39:29 -0700 (PDT)
> Return-Path: <earl.ma...@example1.com>
> Received: from orion.example.com (orion.example.com. [68.111.111.42])
>         by mx.google.com with ESMTPS id 
> f79si14214872qki.10.2015.07.25.06.39.29
>         for <exam...@gmail.com>
>         (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
>         Sat, 25 Jul 2015 06:39:29 -0700 (PDT)
> Received-SPF: neutral (google.com: 68.111.111.42 is neither permitted
> nor denied by best guess record for domain of earl.ma...@example1.com)
> client-ip=68.111.111.42;
> Authentication-Results: mx.google.com;
>        spf=neutral (google.com: 68.111.111.42 is neither permitted nor
> denied by best guess record for domain of earl.ma...@example1.com)
> smtp.mail=earl.ma...@example.com
> Received: by orion.example.com (Postfix)
>     id 4DC19A60368; Sat, 25 Jul 2015 09:39:29 -0400 (EDT)
> Delivered-To: supp...@example.com
> Received: from localhost (localhost [127.0.0.1])
>     by juggernaut.example.com (Postfix) with ESMTP id CB94A181A9E
>     for <supp...@example.com>; Sat, 25 Jul 2015 09:39:28 -0400 (EDT)
> X-ActualMessageSizeBytes: 41474
> X-ActualMessageSize:
> X-Virus-Scanned: amavisd-new at example.com
> X-Spam-Flag: NO
> X-Spam-Score: -0.399
> X-Spam-Level:
> X-Spam-Status: No, score=-0.399 tagged_above=-200 required=5
>     tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, LOC_CDIS_INLINE=0.1,
>     LOC_IMGSPAM=0.1, RDNS_NONE=0.8, RELAYCOUNTRY_LOW=0.5]
>     autolearn=no autolearn_force=no
> Received: from relay.example1.com (relay2.example1.com [206.111.111.44])
>     (using TLSv1 with cipher AES128-SHA (128/128 bits))
>     (No client certificate requested)
>     by juggernaut.example.com (Postfix) with ESMTPS id 71AC0180271
>     for <supp...@example.com>; Sat, 25 Jul 2015 09:39:21 -0400 (EDT)
> Received: from HQXCHA402.example1.com ([fe80::e4d8:XXXX:53e5:e9d2]) by
>  HQXCHA401.example.com ([fe80::7199:XXXX:b314:a497%25]) with mapi id
>  14.03.0224.002; Sat, 25 Jul 2015 06:39:19 -0700
> From: Operations <o...@example1.com>
> To: Support <supp...@example.com>
> CC: Operations <o...@example1.com>
> Subject: User List Request
> Thread-Index: AdDG30D3+GNpY2bR+6PMmxGK/70Bw==
> Sender: "Marsh, Earl" <earl.ma...@example1.com>
> Date: Sat, 25 Jul 2015 13:39:19 +0000
> Message-ID: <68fcc58030b4164e802bb27ff159fe0535e6b...@hqxcha402.example.com>
> Accept-Language: en-US
> Content-Language: en-US
> X-MS-Has-Attach: yes
> X-MS-TNEF-Correlator:
> x-originating-ip: [172.28.53.207]
> Content-Type: multipart/related;
>     boundary="_010_68FCC58030B4164E802BB27FF159FE0535E6B731HQXCHA402bes_";
>     type="multipart/alternative"
> MIME-Version: 1.0
> 
> Any ideas greatly appreciated.
> Thanks,
> Alex
> 

https://de.wikipedia.org/wiki/Sender_Rewriting_Scheme

perhaps with fedora read

https://www.mind-it.info/forward-postfix-spf-srs/
https://github.com/roehling/postsrsd

Best Regards
MfG Robert Schetterer

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