Start with the live form
Enter a domain, URL, IP, email, or record and get a focused result without setup.
Email Security Checker
Audit DMARC, SPF, and DKIM configuration in seconds with a shareable report.
Results
Interactive intelligence tool
Run the check, then ship the workflow
Use the browser tool for a fast answer, then move the same logic into scripts, monitoring, or product flows when it becomes repeatable.
Review decision-ready signals
Outputs highlight statuses, risks, records, and next actions instead of raw provider noise.
Automate the winning workflow
Use the request and response examples to turn a one-off check into an API call or recipe.
Used by people at amazing companies
What this tool helps you decide
Each page is shaped around a practical operational question, not just a raw lookup.
See the current DNS, registration, security, pricing, or reputation evidence.
Compare the result with related checks so the next move is easier to trust.
Copy examples, open linked tools, or move into API documentation when you need scale.
Trust signals before you integrate
Transparent docs, authenticated requests, and visible reliability details make it easier to evaluate DomScan before you ship.
Uptime
API artifacts
OpenAPI, Swagger, Postman, CLI, SDK, and MCP links are one click away.
API keys
Protected access
Authenticated endpoints use API keys with clear credit costs before you call them.
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Active
Example Request
Start from the curl and HTTP samples, then map the parameters into your application code.
Key Features
Email Security Checker
Check SPF, DKIM, and DMARC configuration.
Optional DKIM selector
We will probe common selectors if left blank.
Check Security
Check SPF, DKIM, and DMARC configuration.
Example Request
GET /v1/email-auth?domain=example.comExample Response
{
"spf": "pass",
"dmarc": "pass",
"dkim": "pass"
}Built from the same API surface
The browser experience previews DomScan's structured endpoints, so teams can validate a use case before writing code.
Frequently Asked Questions
What does the email security checker test?
It inspects SPF, DMARC, and DKIM records for the domain and summarizes whether core email authentication is configured correctly.
Why is DMARC important?
DMARC tells receiving mail servers how to handle spoofed mail and gives you reports so you can monitor abuse and rollout progress.
What happens if I do not know my DKIM selector?
Leave the selector blank and we will probe common selectors automatically. If your provider uses a custom selector, enter it for a more precise result.
When should I use this API instead of a one-off DNS lookup?
Use the API when you want a single, explainable pass/fail view across SPF, DKIM, and DMARC instead of manually checking multiple TXT records.