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B2A Email Deliverability, MX, SPF & DMARC Verifier
B2A Email Deliverability, MX, SPF & DMARC Verifier is a paid API for AI agents from preflight.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-21).
Validates an email address for syntax correctness, disposable/burner provider status, role account detection, and live DNS MX, SPF, and DMARC record existence.
Price / call$0.005
Success—
StatusUnknown
How this service works
Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMARC records. (Live x402 v2, IETF MPP & MCP endpoint at https://preflight.agentdiet.dev/v1/email-validator)
Output
Returns a structured object indicating whether the email address passes syntax checks, whether the domain has live MX records enabling delivery, whether SPF and DMARC DNS records are configured, whether the provider is a known disposable or burner service, and whether the address is a role account (e.g. info@, admin@, support@).
Example use cases
Block burner emails at signup
“Before I add this user to my CRM, check if their email address throwaway123@mailnull.com is a disposable or burner account and whether it has valid MX records so I know if it's worth keeping.”
Pre-send campaign email hygiene
“I'm about to send a newsletter to leads@acmecorp.com — can you verify it's a real deliverable address, check the domain's MX and SPF records, and tell me if it's a role account I should avoid?”
Audit email authentication for a domain
“Can you check the email noreply@startup.io and tell me whether the domain has proper SPF and DMARC DNS records configured, and whether the address itself is valid and deliverable?”
Technical details
Endpoint
GEThttps://preflight.agentdiet.dev/v1/email-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a comprehensive, single-call email health check that combines syntax validation, live DNS MX/SPF/DMARC lookups, disposable provider screening, and role account detection — rather than calling separate DNS lookup or email ping services. It is especially useful for pre-CRM ingestion, lead qualification, signup fraud prevention, and pre-send campaign hygiene where all four dimensions matter.
Side effects
- Invalid or missing email parameter returns an error
- DNS lookup timeout for obscure or newly registered domains
- False negatives on very new disposable providers not yet in blocklists
- Role account detection limited to common patterns
- Non-existent TLDs or malformed domains may produce ambiguous results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| emailrequired | string | Email address to validate for syntax, MX deliverability, and disposable risk |
Output
Schema · Response
{
"type": "object"
}Reviews
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