While trying to fix SPF checking on my server I discovered that you need for resolve.conf to have a “nameserver” entry. My setup read “dns-nameserver”.
So, now my file reads:
“dns-nameserver 127.0.0.1
nameserver 127.0.0.1”
But, things are working correctly now.
About the Author
Mickey Chandler is a Consultant & Attorney with over 28 years of experience in Email Deliverability & Privacy Law. He has a strong background in email authentication infrastructure (SPF, DKIM, DMARC), ISP and mailbox provider relations, anti-spam policy and compliance, CAN-SPAM and state anti-spam law gained through overseeing the Abuse & Compliance team at Salesforce Marketing Cloud, originating the ISP relations role at Informz (now part of Higher Logic), and working in the fight against spam since 1997. He holds a B.A. in Government, a B.S. in Computer Information Systems, and a J.D. from the University of Houston Law Center. He is a certified CIPP/US professional and a certified CIPM professional. He has speaker at M3AAWG, podcast guest.