The current settings cause the SPF record of the original from: host to be checked, rather than those of tools.wmflabs.org:
valhallasw@gmail.com -> valhallasw@tools.wmflabs.org -> valhallasw@arctus.nl
```
Delivered-To: valhallasw@arctus.nl
Received: by 10.107.55.7 with SMTP id e7csp52297ioa;
Thu, 3 Dec 2015 07:29:28 -0800 (PST)
X-Received: by 10.140.232.65 with SMTP id d62mr12365942qhc.27.1449156568542;
Thu, 03 Dec 2015 07:29:28 -0800 (PST)
Return-Path: <valhallasw@gmail.com>
Received: from mail.tools.wmflabs.org (mail.tools.wmflabs.org. [208.80.155.162])
by mx.google.com with ESMTPS id w104si1741458qge.65.2015.12.03.07.29.28
for <valhallasw@arctus.nl>
(version=TLS1 cipher=AES128-SHA bits=128/128);
Thu, 03 Dec 2015 07:29:28 -0800 (PST)
Received-SPF: softfail (google.com: domain of transitioning valhallasw@gmail.com does not designate 208.80.155.162 as permitted sender) client-ip=208.80.155.162;
Authentication-Results: mx.google.com;
spf=softfail (google.com: domain of transitioning valhallasw@gmail.com does not designate 208.80.155.162 as permitted sender) smtp.mailfrom=valhallasw@gmail.com;
dkim=pass header.i=@gmail.com;
dmarc=pass (p=NONE dis=NONE) header.from=gmail.com
Received: from mail-ig0-f174.google.com ([209.85.213.174])
by mail.tools.wmflabs.org with esmtp (Exim 4.76)
(envelope-from <valhallasw@gmail.com>)
id 1a4Vp2-0001sC-6p
for valhallasw@tools.wmflabs.org; Thu, 03 Dec 2015 15:29:28 +0000
Received: by igbxm8 with SMTP id xm8so14673378igb.1
for <valhallasw@tools.wmflabs.org>; Thu, 03 Dec 2015 07:29:20 -0800 (PST)
```