Email authentication triage

DNS records show the public configuration receivers can inspect. If the base records are missing or unexpected, a DMARC finding may not explain the real delivery issue.

SPF-style TXT records can fail because of missing records, duplicate records, include chains, syntax issues, or lookup depth. Treat TXT output as a DNS configuration signal.

DMARC policy, alignment mode, reporting addresses, and enforcement level affect how receivers may treat mail. A parser can help, but provider dashboards remain the source of delivery truth.

Passing public DNS checks does not guarantee inbox placement. Reputation, content, sending infrastructure, authentication alignment, and receiver rules still matter.