Email security tools

SPF and DMARC Checker

Check whether a domain publishes SPF and DMARC records before email spoofing, phishing, and deliverability problems become visible.

Public diagnostics only. Private, localhost, multicast, and reserved targets are blocked.

Waiting for input

Highlights SPF and DMARC presence, policy strength, and missing-record risk.

Run a public check to understand the symptom before deeper troubleshooting.

What this tool checks

Highlights SPF and DMARC presence, policy strength, and missing-record risk.

Built for practical checks

Use it when someone asks:

spf checkerdmarc checkeremail security records

Answer block

What this tool tells you and when to escalate

What does the SPF/DMARC tool check?

Highlights SPF and DMARC presence, policy strength, and missing-record risk.

When should I use the SPF/DMARC tool?

Use it when you need a quick public signal for spf checker, dmarc checker, email security records before deeper troubleshooting.

When should this become a service request?

If the result affects users, email delivery, security exposure, firewall access, or a client requirement, route it to Network Security.

From tool result to fix

Harden email and domain security

A public tool can show the symptom. QuantumCrafters Studio can help validate the root cause, document the change, and turn it into a managed service, network security, cloud, or penetration testing workflow.

Ready when you are. Share the issue and we will suggest the right next step.