verifykit
97%+ accuracy · results in ms

Email checker
that goes deeper

Check if any email address is valid, deliverable, and safe to send to — with real SMTP verification, not regex.

Check an emailRead docs

What it catches

Every shape of bad email — caught before it ever lands in your database.

Invalid emails

Mailboxes that don’t exist, typo’d domains, unreachable servers — bounces that wreck your sender reputation.

Disposable addresses

Throwaway mailboxes from Mailinator, Guerrilla Mail, 10MinuteMail and 100k+ others — caught and flagged.

Role-based emails

Shared inboxes like info@, admin@, support@ — high spam-complaint rates, low engagement.

Typos before submit

gmial.com → gmail.com, yhaoo.com → yahoo.com. Suggest the fix while the user is still on the form.

Dead domains

Domains with no MX records or expired DNS. Filtered before they ever reach your queue.

Risky catch-alls

Domains that accept every address as “valid”. Scored separately so you can decide your risk tolerance.

How it works

A five-layer verification pipeline

Every email runs through the same five layers. Each layer narrows the verdict — what comes back is one number you can act on.

01

Syntax & format

RFC 5322 compliant check — catches typos, malformed domains, missing @, invalid characters.

02

DNS & MX lookup

Queries the domain for active mail-exchange records. Confirms the domain can actually receive email.

03

Reputation analysis

Cross-references 100,000+ known disposable providers and flags role-based + free-provider addresses.

04

SMTP mailbox check

Opens an SMTP conversation with the recipient server to verify the mailbox exists — no email is ever sent.

05

Score & grade

Combines every signal into a 0.0–1.0 deliverability score and an at-a-glance quality grade.

Helps demonstrate due diligence under GDPR / CAN-SPAM / CASL — record only consenting, real addresses.

Live playground

Check any email, right now

Try presets, flip options, see the live response. No signup, no key required.

Open playground

Simple pricing

Cancel anytime. 14-day money-back if it's not for you.

20% off · first 3 months

Starter

$7.20/ mo
$920% off
$0.0018 / validation
  • 5,000 validations / month
  • real SMTP verification
  • single API key
  • validation history
Get Starter
20% off · first 3 months

Growth

$15.20/ mo
$1920% off
$0.0013 / validation
  • 15,000 validations / month
  • bulk validation
  • real SMTP verification
  • email OTP 2FA (25k/mo)
Get Growth
20% off · first 3 months

Pro

$39.20/ mo
$4920% off
$0.001 / validation
  • 50,000 validations / month
  • unlimited API keys
  • duplicate removal
  • webhooks & callbacks
Start with Pro
20% off · first 3 months

Unlimited

$199.20/ mo
$24920% off
$0.0001 / validation
  • unlimited validations
  • all Pro features
  • dedicated support
  • fair use up to 5M/mo
Get Unlimited

Email checker FAQ

What does the email checker actually check?
Five layers: syntax (RFC 5322), DNS/MX lookup, disposable + role-based detection, SMTP mailbox verification, and a deliverability score. Each email comes back with a quality grade you can act on.
How is this different from a regex email checker?
Regex only inspects the string. We confirm the domain has a mail server and we open an SMTP conversation to confirm the mailbox exists. That’s the difference between ~85% and 97%+ accuracy.
Can I check emails in bulk?
Yes. Bulk checking is included from the Growth plan ($19/mo). Upload a CSV, get a CSV back. Or POST a JSON array to /v1/verify/bulk.
How fast is the email checker?
Syntax + MX checks complete in ~100ms. Full SMTP verification takes 300–500ms on average. Edge-deployed so latency stays low everywhere.
Does the email checker actually send a message to the address?
No. SMTP verification negotiates with the mail server up to the RCPT TO step and disconnects. No message is delivered, the user never knows.

Start checking emails today

Try the playground or get an API key for programmatic access.

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