Bad email data breaks more than email.

I built emailverifier.dev because one unchecked address can break signup, confirmation, recovery, notifications, support, and sales.

See the full story

One addressMultiple signals

CHECK
THE
WHOLE
ADDRESS.

Structure, mail routing, provider risk, and mailbox evidence. One request, before you trust or store the address.

Why verify emailScroll to follow

01 / 04

An email address is infrastructure.

Signup, confirmation, recovery, notifications, support, and sales can all depend on one field being usable.

02 / 04

Check more than the string.

Look at structure, mail routing, provider type, risk signals, and, when available, mailbox acceptance and catch-all behavior.

03 / 04

Keep the evidence honest.

Separate confirmed failures from risk and from answers the network could not settle. They should not trigger the same decision.

04 / 04

Act before the damage spreads.

Correct what is fixable, block what is confirmed bad, confirm when inbox access matters, and let clean signups continue.

What reaches your productOne field

Likely typo

alex@gmial.com

Correctable while the user is present

Disposable

Temporary inbox

A risk signal for your policy

Role address

support@…

Often shared by a team

Mail routing

No usable route

A confirmed domain-level failure

The string looks small. Everything depending on it is not.

One verification requestMultiple checks

01StructureSyntax and likely typos

02DomainMail-routing DNS

03ContextProvider type, disposable, and role signals

04MailboxAcceptance and catch-all evidence when available

No single check pretends to know the whole answer.

Evidence stays separateNo magic boolean

Checks passed

No blocking evidence found

Continue under your normal signup policy.

Confirmed failure

Broken structure, routing, or explicit rejection

Block and ask for another address.

Risk signal

Disposable, role, typo, or catch-all behavior

Correct, confirm, review, or block according to risk.

No clear answer

The network did not support a firm mailbox claim

Confirm ownership or review instead of guessing.

Different evidence deserves different handling.

Your product decidesBefore storage or send

ACT ON
WHAT YOU
KNOW.

CorrectLikely typo

BlockConfirmed failure

ConfirmAccess matters

ContinueChecks passed

01 / 04

An email address is infrastructure.

Signup, confirmation, recovery, notifications, support, and sales can all depend on one field being usable.

02 / 04

Check more than the string.

Look at structure, mail routing, provider type, risk signals, and, when available, mailbox acceptance and catch-all behavior.

03 / 04

Keep the evidence honest.

Separate confirmed failures from risk and from answers the network could not settle. They should not trigger the same decision.

04 / 04

Act before the damage spreads.

Correct what is fixable, block what is confirmed bad, confirm when inbox access matters, and let clean signups continue.

Why I built it

Too much of a product depends on one unchecked field.

I kept seeing apps collect an address first and discover its problems later. By then the welcome email had bounced, recovery was broken, a lead was unreachable, or a throwaway account was already inside.

So I built emailverifier.dev to inspect the address at the boundary. It returns concrete checks and risk signals, while the product using it keeps control of the decision.

Check the whole address.

Check structure, likely typos, mail-routing DNS, disposable and role classifications, plus SMTP acceptance and catch-all behavior when available.

Use the result your way.

Correct a likely typo, block a confirmed failure, apply your own disposable-address policy, or require confirmation when inbox access matters.

Pay when you need more.

Start with 1,000 non-expiring credits on your first project. Add 20,000 more for $10 whenever you need them.

Know more before the address reaches your database.

Create your first project with 1,000 non-expiring starter credits. No card required.

Create your project Read the API docs