Posts tagged: dns
Fix "MTA-STS Policy Is Missing: STSFetchResult.NONE"
Seeing "MTA-STS policy is missing: STSFetchResult.NONE"? Diagnose it in 3 stages — DNS TXT record, HTTPS policy fetch, TLS cert — with copy-paste commands.
SPF Record Syntax: The Complete Reference (RFC 7208)
Every SPF record syntax element in one reference: mechanisms, qualifiers, modifiers, macros, and DNS limits — with RFC 7208 section cites and real examples.
How to Set Up BIMI (and Why 28% of Records Break)
BIMI puts your logo in the inbox — but 28% of records break. Here's how to set up BIMI: the DNS TXT record, SVG Tiny PS logo, and VMC vs CMC. Check yours free.
DMARC for Google Workspace: Step-by-Step Setup [2026]
Set up DMARC for Google Workspace step-by-step: the exact TXT record, where to publish it, and the p=none to reject rollout. 2026 guide.
SPF Flattening: Fix Too Many DNS Lookups (2026)
148,655 domains exceed the SPF 10-lookup limit. Learn what SPF flattening is, when to use it, 4 safer alternatives, and step-by-step fixes. Check free.
SPF Softfail vs Hardfail: Which to Use?
53.6% of domains use SPF softfail, 40.2% use hardfail. Learn how each qualifier works, how DMARC changes the equation, and which to choose. Check your SPF free.
SPF PermError: How to Find and Fix It (2026 Guide)
SPF PermError breaks DMARC alignment and kills deliverability. Learn the 5 causes, step-by-step fixes, and platform-specific examples. Check your SPF free.
DKIM Fail: How to Fix Alignment and Verification Errors
DKIM failing? Learn why DKIM alignment breaks, how to fix body hash errors, and how to configure third-party senders. Step-by-step guide with CLI commands.
DMARC Quarantine/Reject Policy Not Enabled: Fix It
See 'DMARC quarantine/reject policy not enabled'? Learn what it means, why it matters, and how to fix it step by step for any DNS provider. Free checker included.