Email Validator & Domain Email Health (MX, SPF, DMARC, DKIM)

Two tools in one Actor, for AI agents, lead-list cleaning, signup forms and email deliverability audits:

1. Email check: is this address worth sending to? Syntax, domain existence, MX / null MX / A-record fallback, disposable domain (open list of 4,000+ throwaway domains), free webmail, role account (info@, sales@...), SPF and DMARC presence. Verdict deliverable / risky / undeliverable / invalid, a 0-100 score and the reasons.
2. Domain email health: full email-authentication audit of a domain: MX and mail provider, SPF (all mechanism, DNS lookups), DMARC policy and reporting, DKIM on 20 common selectors (wildcard-aware), MTA-STS, TLS-RPT, BIMI, domain registration date (RDAP). Grade A to F with concrete fixes.

No email is ever sent and no SMTP probe is made: only public DNS and RDAP lookups. Safe for your IPs and your sender reputation.

Use cases

• An AI SDR agent cleans a lead list before an outreach sequence (drop disposable, invalid and dead domains).
• A signup form blocks throwaway addresses.
• An agency audits a prospect's SPF/DMARC/DKIM setup and sends them the fixes.
• A CRM enrichment step tags role accounts and free webmail addresses.

Input

Field	What it does
emails	List of email addresses to validate.
domains	List of domains (or URLs) to audit.
queries	Advanced: [{"endpoint": "email_check", "params": {"email": "..."}}, {"endpoint": "domain_email_health", "params": {"domain": "..."}}]
maxQueries	Safety cap on checks per run (default 1000).

Example:

{
  "emails": ["sales@stripe.com", "test@mailinator.com"],
  "domains": ["bbc.co.uk"]
}

Output

One dataset item per check. Shortened examples from a real run:

{
  "endpoint": "email_check",
  "input": {"email": "sales@stripe.com"},
  "ok": true,
  "result": {
    "verdict": "deliverable",
    "score": 85,
    "reasons": ["role_account"],
    "disposable": false,
    "free_provider": false,
    "role_account": true,
    "mx_found": true,
    "spf": true,
    "mailbox_verified": false,
    "note": "No SMTP probe is performed: the domain can receive mail, the individual mailbox is not verified."
  },
  "charged_event": "email-check",
  "price_usd": 0.003
}

• test@mailinator.com → "verdict": "risky", reason disposable_domain.
• bbc.co.uk (domain audit) → grade B, DMARC policy reject, with the list of recommendations.

Pricing (pay per event)

Event	Price
Email address checked	$0.003
Domain audited	$0.01

No start fee. Not charged: addresses with invalid syntax, domain audits of domains that do not exist, invalid input, DNS/source outages and internal errors (the item says "ok": false or "verdict": "invalid" and why).

Honest limits

• No mailbox verification: we know whether the domain accepts mail, not whether the exact mailbox exists, and catch-all domains are not detected. This is deliberate (no SMTP probing).
• DKIM is tested on 20 common selectors: a custom selector can exist without being seen.
• RDAP registration data is unavailable for some country domains (e.g. .sn, .ci): the domain age is then null.
• Disposable-domain detection relies on an open community list (CC0); brand-new throwaway domains may not be on it yet.

Data sources

• Public DNS (MX, TXT, A records), queried live
• RDAP (RFC 9083) for domain registration data
• disposable-email-domains, CC0 1.0

Made by Novarithm, AI agents and automation. Contact: contact@novarithm.com

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