I have a message that was rejected by Gmail, I don't know why. It passes SPF. We aren't using DKIM. Do I need to set up DKIM?
I am in control of "example.com". Our mail server is "server.example.com" (hosted at bluehost)
Our SPF record is
v=spf1 +a +mx ?include:bluehost.com -all
However Gmail rejected a message with:
550-5.7.1 Unauthenticated email from example.com is not accepted due to 550-5.7.1 domain's DMARC policy. Please contact administrator of example.com ...
The message headers:
Return-path: <sabrina@example.com>
Received: from [99.127.228.246] (port=61813 helo=[192.168.1.66])
by server.example.com with esmtpsa (TLSv1:AES128-SHA:128)
(Exim 4.80.1)
(envelope-from <sabrina@example.com>)
id 1VMLM8-0007ok-5c; Wed, 18 Sep 2013 17:16:03 +0000
From: Sabrina <sabrina@example.com>
Content-Type: multipart/alternative; boundary="Apple-Mail=_2FE0763D-B160-49C4-8202-B8258851AFAD"
Subject: positive self thoughts/talk
Date: Wed, 18 Sep 2013 10:15:24 -0700
Message-Id: <D85DC2BA-0E8A-4AF6-9C54-203C52E996F2@example.com>
To: Tanja Schulte-Irwin <tanjaschulte@gmail.com>,
Zachary Bloom <zbloom@sffriendsschool.org>
Mime-Version: 1.0 (Apple Message framework v1278)
X-Mailer: Apple Mail (2.1278)