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SPF / DKIM / DMARC Inspector

SPF / DKIM / DMARC Overview

The StripDNS SPF / DKIM / DMARC tool is built for fast, practical checks when you need reliable answers without jumping between multiple dashboards. Inspect SPF records and email-auth related DNS configuration. It is especially useful for email authentication policy checks, whether you are diagnosing outages, validating infrastructure changes, or preparing before a migration. Results are optimized for speed and readability so you can move from detection to action quickly during production incidents. For best outcomes, compare findings over time, cross-check with related DNS and TLS tools, and rerun checks after each config update to confirm changes propagated as expected.

How To Use This Tool

Common Use Cases

  • Review SPF syntax and policy design.
  • Support email-auth hardening projects.
  • Troubleshoot sender authentication failures.

Recommended Steps

  1. Enter a valid domain, hostname, or IP based on the tool input format.
  2. Run the lookup and review key output fields first before deep details.
  3. Repeat after any DNS, network, or infrastructure change to confirm results.

Interpretation Tips

  • Compare results over time instead of relying on a single snapshot.
  • Cross-check with related tools for stronger confidence.
  • Document findings with timestamps during incident handling.
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WHOIS DNS IP Geo
FAQ

SPF is a DNS TXT policy listing authorized sending hosts for a domain.

It usually indicates syntax problems, excessive lookups, or invalid include mechanisms.

Together they provide stronger sender authentication and spoofing protection.

SPF evaluation allows a maximum of 10 DNS lookups.

Use the strictness that matches your validated sender inventory and rollout stage.