Email Verifier & Validator — Bulk, SMTP, Catch-all & Disposable

Clean and validate email lists at scale with deep, real-time verification. For every address you get a clear status (valid / invalid / risky / unknown), a 0–100 score, and the full signal set: live SMTP check, catch-all detection, deliverability, MX, disposable, role account, free provider, spam-trap, and a "did you mean?" typo fix. No API key, no setup.

Cut bounce rates, protect sender reputation, and stop wasting sends on dead or risky addresses.

Features

• Two modes:
  • Power (default) — deep verification with a live SMTP handshake, catch-all and deliverability detection. Most accurate.
  • Quick — instant check (syntax, MX, disposable, role, free) with no SMTP. Faster and cheaper.
• Bulk — verify up to tens of thousands of emails per run.
• Rich signals per email — is_safe_to_send, is_deliverable, is_catch_all, can_connect_smtp, is_disposable, is_role_account, is_free_email, is_spamtrap, has_inbox_full, is_disabled, mx_record.
• "Did you mean?" — suggests fixes for obvious typos (e.g. gmial.com → gmail.com).
• Confidence score — one 0–100 number for quick filtering.
• Fair pricing — duplicates are removed and never charged.

Input

Field	Type	Description
emails	array	Email addresses, one per line. Required.
mode	string	power (deep SMTP + catch-all, recommended) or quick (instant, no SMTP). Default power.
deduplicate	boolean	Lower-case and de-duplicate before verifying. Default true.

{
  "emails": ["jeff@amazon.com", "info@stripe.com", "test@mailinator.com", "bad@@format"],
  "mode": "power",
  "deduplicate": true
}

Output

One record per email:

{
  "email": "info@stripe.com",
  "status": "risky",
  "score": 69,
  "is_safe_to_send": false,
  "is_deliverable": true,
  "is_catch_all": true,
  "can_connect_smtp": true,
  "is_disposable": false,
  "is_role_account": true,
  "is_free_email": false,
  "domain": "stripe.com",
  "mx_record": "aspmx.l.google.com",
  "did_you_mean": null
}

Status meanings

Status	Meaning
valid	Safe to send — syntax, MX and (in Power mode) SMTP all check out.
invalid	Will bounce — bad syntax, dead domain, no mail server, or spam-trap.
risky	Deliverable but lower quality — catch-all domain, role account, disposable, or a likely typo.
unknown	The mail server couldn't be probed conclusively (some providers block checks) — verify later or treat with caution.

Notes

• Power mode performs a live SMTP conversation with the recipient's mail server to confirm the mailbox where possible, and detects catch-all domains (which accept any address). Some large providers (e.g. Google/Microsoft hosted) deliberately block these probes — those return unknown rather than a false verdict.
• Quick mode skips SMTP for instant results — ideal for fast, high-volume syntax/MX/disposable filtering.