Email-domain control monitoring · self-serve subscription
Stop checking SPF and DMARC by hand.
DomainGuard turns repeat DNS-control checking into a recurring monitoring loop for business domains. Inspect verifiable control state, retain the previous state, and focus attention on meaningful changes instead of repeatedly reopening DNS tools.
Use the related no-signup tools for one-off checks first. Stripe-hosted checkout. Paid plans renew monthly until cancelled. No sales call is required to start.
Start small
US$12/month
Best-value anchor
US$39/month
Decision path
Free → monthly
Free proof path
Try the atomic task before you buy DomainGuard.
These are real no-signup tools already linked to this workflow by commercial intent or source-repository provenance. They prove a narrow task only; they do not claim to replace the paid workflow, monitoring, review or supported delivery.
DMARC TXT Record Inspector
Inspect a pasted DMARC TXT record locally and surface common policy and reporting fields.
JSON → YAML
Turn JSON into readable YAML without sending configuration data to a server.
Mermaid Sequence Diagram → SVG
Render a Mermaid sequence diagram locally for architecture, integration and handoff documentation.
Operations CSV Cleaner
A general local-first cleaner for operational exports and handoff files.
Product-to-free-tool attribution contains only product slug, tool slug and placement. It never includes pasted input, uploaded-file contents or generated output.
Best-fit buyer
Built for a recurring problem.
Small MSPs, IT agencies and email-operations teams responsible for business domains that need repeated visibility into SPF, DMARC and explicitly supplied DKIM control state.
Operating loop
- Register the business domains and the DKIM selectors you actually know.
- Check SPF and DMARC state plus explicitly supplied DKIM state on the recurring schedule.
- Preserve the last known state so routine runs do not create alert noise.
- Surface meaningful degradation and recovery transitions for operator review.
Clear product boundaries
- — DKIM selectors are never guessed.
- — No automatic DNS mutation or destructive remediation.
- — Monitoring does not guarantee inbox placement, sender reputation or provider certification.
- — A clean automated check is evidence about the checked controls, not a full email-security audit.
No consultation required
Start with Starter.
Use the lowest monthly tier first. Upgrade only when the monitored volume grows.