VeriFlowMail

Private beta

Verify with confidence. Deliver with control.

An email verification API that catches invalid domains, disposable addresses and typos before they reach your sign-up form or outreach list.

Create a free accountRead the docs
POST /api/v1/verifications
{ "email": "possible_typo@test.veriflowmail.com" }

{
  "email": "possible_typo@test.veriflowmail.com",
  "status": "risky",
  "reason": "possible_typo",
  "suggestion": "possible_typo@gmail.com",
  "score": 30,
  "flags": {
    "disposable": false,
    "role": false,
    "free_provider": false,
    "catch_all": null
  },
  "mode": "fast"
}
A real test-mode response. Live keys check real addresses the same way.

What a fast check catches

Fast checks look at the address and its domain's DNS in milliseconds. They never email anyone.

  • Typos, with a fix

    The domain looks like a misspelling of a common provider.

    possible_typo

  • Disposable addresses

    The domain belongs to a disposable (temporary) email service.

    disposable_domain

  • Domains that don't exist

    The domain does not exist.

    domain_not_found

  • Domains with no mail server

    The domain exists but has no mail server.

    no_mx_records

  • Role addresses

    The address belongs to a role or team (e.g. info@), not a person.

    role_account

  • Broken syntax

    The address is not a valid email address.

    invalid_syntax

How it works

  1. 1

    Create a free account

    Confirm your email, then create an API key in the dashboard. It's shown once and stored only as a hash.

  2. 2

    Try it in test mode

    Test keys accept addresses at test.veriflowmail.com and return fixed results, so you can build without using your allowance.

  3. 3

    Act on the answer

    Every result has a status, a reason code and a score. Block undeliverable addresses, ask about risky ones, suggest the fix for typos.

Straight about limits

  • A fast check confirms the domain can receive email, not that the mailbox exists.
  • Deep checks, which ask the mail server whether the mailbox exists, aren't available yet. We'll add them only once our tests show they give trustworthy answers.
  • We don't publish an accuracy percentage until we've measured one. Some providers hide whether a mailbox exists, so some answers will always be unknown.
  • A temporary DNS failure is reported as unknown, never as undeliverable, and unknown results don't count toward your allowance.

Careful with your data

  • Stored results are deleted after 30 days.
  • API keys are shown once and stored only as hashes. Revoking one takes effect on the next request.
  • Passwords are hashed with Argon2id, and logs never contain addresses, passwords or keys.
  • Every organisation's data is kept apart, and that's tested for every feature.

Start free

The free plan includes 5,000 fast checks a month and 60 requests a minute. No card needed.

Create a free account