[opendmarc-users] dmarc fail on internal emails

[Ian Evans]

Installed opendmarc last week in a postfix/amavis-new environment and all
seemed to be working quite well.

If I send a message from user1 at example.com to a gmail address and check the
headers, I get a pass on the dmarc check.

If I send an internal email from user1 at example.com to user2 at example.com, I
get a dmarc fail.

Any idea where I should be checking first?

Authentication-Results: amavis.local (amavisd-new); dkim=pass (1024-bit key)
    header.d=example.com
Received: from mail.example.com ([127.0.0.1])
    by localhost (mail.example.com [127.0.0.1]) (amavisd-new, port 10024)
    with ESMTP id Ved6pUoj-cwl for <ianevans at example.com>;
    Thu, 20 Apr 2017 14:25:34 -0400 (EDT)
Received: from [10.254.248.55] (unknown [69.42.191.138])
    (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits))
    (Client did not present a certificate)
    (Authenticated sender: feedback at example.com)
    by mail.example.com (Postfix) with ESMTPSA id 0F56E2009D7
    for <ianevans at example.com>; Thu, 20 Apr 2017 14:25:34 -0400 (EDT)
DMARC-Filter: OpenDMARC Filter v1.2.0 mail.example.com 0F56E2009D7
Authentication-Results: mail.example.com; dmarc=fail header.from=example.com

Thanks!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.trusteddomain.org/pipermail/opendmarc-users/attachments/20170420/d036aa82/attachment.htm>