title: Postmaster SPF FAILing/Email headers show PASS
body: <p>I'm using a domain (say xyz.com) to send marketing mails. We've done SPF/DKIM/DMARC authentication and we see the same in the email body (show original option in gmail)- SPF PASS DKIM PASS but the same domain in postmaster shows 100% DKIM, 0% DMARC, 0% SPF in authentication?</p>
  
  <p>Any idea what is happening here? Also how important is RDNS for gmail spam filters?</p>