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: <firstname.lastname@example.org> Received: from [188.8.131.52] (port=61813 helo=[192.168.1.66]) by server.example.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.80.1) (envelope-from <email@example.com>) id 1VMLM8-0007ok-5c; Wed, 18 Sep 2013 17:16:03 +0000 From: Sabrina <firstname.lastname@example.org> 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 <email@example.com>, Zachary Bloom <firstname.lastname@example.org> Mime-Version: 1.0 (Apple Message framework v1278) X-Mailer: Apple Mail (2.1278)