Email Authentication Fix Guides
Step-by-step guides for every SPF, DKIM, and DMARC error. Find the exact error InboxGreen flagged and follow the fix.
DMARC Record Not Found: What It Means and How to Fix It
By The InboxGreen Team
A DMARC record not found error means no TXT record exists at _dmarc.yourdomain.com. Learn what it means, why it matters, and how to fix it in Cloudflare, Namecheap, and GoDaddy.
SPF Record Not Found: What It Means and How to Fix It
By The InboxGreen Team
SPF record not found means no TXT record starting with v=spf1 exists at your domain root. Learn what it causes and how to add SPF in Cloudflare, Namecheap, and GoDaddy.
DKIM Selector Not Found: What It Means and How to Fix It
By The InboxGreen Team
DKIM selector not found means no valid DKIM public key was found for your domain. Learn why this happens and how to enable DKIM in Google Workspace, Microsoft 365, and other providers.
Multiple SPF Records: Why It Breaks Email and How to Fix It
By The InboxGreen Team
Multiple SPF records cause a PermError that breaks email authentication. Learn why you can only have one SPF record and how to merge them correctly.
SPF Too Many DNS Lookups: What It Means and How to Fix It
By The InboxGreen Team
SPF fails with a PermError when your record requires more than 10 DNS lookups. Learn what counts as a lookup and how to reduce the number to fix SPF.
DMARC p=none: Why Monitoring Mode Is Not Enough and How to Upgrade
By The InboxGreen Team
DMARC p=none means your domain is in monitoring mode only and no emails are blocked even when authentication fails. Learn when and how to upgrade to p=quarantine or p=reject.
DMARC Alignment Failure: What It Means and How to Fix It
By The InboxGreen Team
DMARC alignment failure means your email passed SPF or DKIM but the authenticated domain does not match your From address domain. Learn how to diagnose and fix alignment.
List-Unsubscribe Header Missing: What It Means and How to Add It
By The InboxGreen Team
Missing List-Unsubscribe headers can hurt bulk email deliverability and violate Gmail and Yahoo requirements for senders. Learn how to add it correctly.
SPF Softfail (~all): What It Means and When to Use -all Instead
By The InboxGreen Team
SPF ~all (softfail) means unauthorized senders are flagged but not blocked. Learn when softfail is appropriate and how to upgrade to -all (hardfail) safely.
Not sure which issue you have?
Run your domain through the free InboxGreen checker and see exactly which records are missing or broken.