On Mon, Oct 24, 2016 at 12:54 PM, Florian Fainelli [off-list ref] wrote:

The older setup was using smtphost.broadcom.com which we have now
documented as being invalid, here Jonathan used gmail directly (since
that's our mail provider now):

Received: from lbrmn-lnxub108.corp.ad.broadcom.com ([216.31.219.19])
        by smtp.gmail.com with ESMTPSA id
s89sm8325746qkl.44.2016.10.24.12.12.00
        (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128);
        Mon, 24 Oct 2016 12:12:03 -0700 (PDT)

Hmm. I get that too, so if that's the right thing for a broadcom.com
address, it's not the smtp server issue.

We had a few cases of the kernel mailing list itself messing up emails
sufficiently to fail dkim, but that shouldn't be an issue for the
relaxed/relaxed model that broadcom uses (the vger mailing list
software screws up whitespace, which "relaxed" ignores).

Is there something else we need to check? Here is what I read for the
cover-letter:

Authentication-Results: mx.google.com;
       dkim=pass header.i=@broadcom.com;
       spf=pass (google.com: domain of ...

Hmm. I get:

  Authentication-Results: mx.google.com;
         dkim=fail header.i=@broadcom.com;

with the actual dkim signature looking like this:

  DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=broadcom.com; s=google;
        h=from:to:cc:subject:date:message-id;
        bh=9zStGnsZQDQqP6cm1CHPk7EYVtLvDsm2wN5qy5Mgx7M=;
        b=Z/1QD+FwJogJY9D8Qd197Q+VJt7Tr9+WoHFeKYRL00yhvxrMg0P8jKj1FbucJTluvM
         agC2eq9qCpZcNAfridjExDRDCuUPAIJIXTr9Npkpqlk6gEMq2FysrGer2D9Z4HQ/atTX
         67VirFsQK0gK7impYMn9kW5Q9BIIw5bOg7OdI=

and those fields that it protects look like this:

  From: Jonathan Richardson [off-list ref]
  To: Srinivas Kandagatla [off-list ref], Maxime
Ripard [off-list ref]
  Cc: linux-arm-kernel at lists.infradead.org,
linux-kernel at vger.kernel.org, devicetree at vger.kernel.org, Mark Rutland
[off-list ref], Rob Herring [off-list ref], Scott
Branden [off-list ref], Ray Jui [off-list ref],
bcm-kernel-feedback-list at broadcom.com, Jonathan Richardson
[off-list ref]
  Subject: [PATCH v1 0/3] Add support for Broadcom OTP controller
  Date: Mon, 24 Oct 2016 12:12:01 -0700
  Message-Id: [ref]

and I don't see anything obviously wrong anywhere - except for that
"dkim=fail" thing, and the email being in my spam folder.

               Linus