Email & domain health API

One API call returns SPF, DKIM, and DMARC grades for any domain you own.

Built for the person who runs email for a small company or on their own. Pass a domain, get letter grades (A–F) and the specific findings behind each one — no dashboard login, no setup wizard.

Request API Access Read the DMARC Guide
lumirallc.comOverallA
A
SPF
SPF is published and enforced with a hard fail.
ok
A
DKIM
DKIM key(s) published for selector(s): zmail.
ok
A
DMARC
DMARC is published and enforced with a reject policy.
ok
Live result from GET /v1/email-auth/lumirallc.com · best-effort, not a guarantee.

This is our own domain, checked live — SPF, DKIM, and DMARC all green. Every grade comes with the exact findings behind it.

What it checks

Every signal that decides whether your mail lands.

SPF

Graded A–F** with the parsed record, detected errors, and alignment status against your sending domain.

DKIM

Graded A–F** with key retrieval, signature validity, and selector findings.

DMARC

Graded A–F** with policy evaluation, alignment mode, and the exact tag-level issues that lower your grade.

Full report

one call** also runs SSL/certificate expiry, MX/DNS health, WHOIS/domain expiry, blacklist/DNSBL status, and disposable-email detection.

How it works

From zero to graded in three steps.

1

Request a key

fill out the access form; you receive an API key by email.

2

Call the endpoint

send GET /v1/email-auth/{domain} (or /v1/report/{domain} for all checks) with your key in the X-API-Key header.

3

Read the grades and findings

the response returns a letter grade (A–F) per check and the specific record text, errors, or expiry dates that produced it.

On the roadmap

  • Coming soonContinuous monitoring + change alertsscheduled re-checks of your domain's SPF, DKIM, DMARC, SSL, and blacklist status, with email or Slack notification when something changes. Coming soon.
  • Coming soonFree one-click public scanner (lumirallc.com/check)no signup, no API key; paste a domain and get a shareable health report. Coming soon.
  • Coming soonSelf-serve checkoutsign up, pick a plan, and get a key without contacting anyone. Coming soon.

Today, Lumira is an on-demand API: you request access, get a key, and call it when you need a check.

Run an authenticated check against your domain today — request access and get your key.

Request API access API docs