Email & Domain Auth Checker: MX, SPF, DKIM & DMARC
Check MX, SPF, DKIM and DMARC records from DNS alone — spot disposable and role addresses too.
In plain language.
Every domain publishes its own DNS records for MX, SPF, DKIM and DMARC — the public signals that determine whether mail sent to it will actually arrive and be trusted. This tool reads all of them directly, with no SMTP connection and no mailbox ping.
Five honestly distinct outcomes replace one generic failure: a domain that doesn't exist, one that resolves but can't receive mail, a genuine DNS hiccup, bad input, or a fully checked domain — plus disposable and role-address flags for cleaning a list.
Runs the same whether a person checks one address or an AI agent bulk-checks a hundred mid-workflow.
Who it's for
- Growth and ops teams cleaning a signup or lead list before it hits a CRM
- Security and deliverability teams auditing SPF/DKIM/DMARC coverage
- AI agents that need a DNS-based email/domain check in a larger workflow
Pricing
$0.005 per input checked.
No subscription. Failed or empty inputs are never charged.
Fewer knobs. Better defaults.
DNS-only, no SMTP
No mailbox ping, no greylisting false negatives — just the public MX/SPF/DKIM/DMARC records.
Five honest outcomes
Doesn't-exist, can't-receive-mail, DNS-error, bad-input and fully-checked are never collapsed into one failure.
Disposable & role flags
Checked against bundled open lists — clean a signup or lead list before it hits your CRM.
Same tool, callable as an MCP server.
Email & Domain Auth Checker runs on Apify, which means it's exposed as a remote MCP tool with no extra setup. Point any MCP-compatible agent (Claude, Cursor, and others) at the endpoint below.
View full API reference on Apify{ "inputs": ["user@example.com", "mailinator.com"] }
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