Is the email validator really free?

Yes — no signup, 20 checks per minute per IP. For batch cleaning of thousands of emails, see our paid plans.

How accurate is the SMTP check?

Our SMTP probe confirms whether the mail server will accept the address. Accuracy is ~98% for non catch-all domains; catch-all domains always respond positively, which we flag as risky.

What is a catch-all domain?

A domain that accepts ALL addresses, even non-existent ones. Mail may bounce later. We detect this and mark the result as risky.

Do you store my emails?

No. The single validator is stateless — emails are not logged or stored.

What is the deliverability grade?

A 0–100 composite score (syntax, DNS, SMTP, catch-all, role-based, disposable, MX health) mapped to A/B/C/D/F.

Why did I get "did you mean"?

The domain didn't resolve but is one Levenshtein edit away from a common one (gmial.com → gmail.com). We suggest the fix.

Can I use this via API?

Yes, POST /api/validate-email. See API docs. With an API key, rate limits are raised per plan.

What does "risky" mean?

Syntax and DNS pass, but catch-all, role-based, or suspicious local-part patterns mean the inbox likely exists but may damage sender reputation.

Free Email Address Validator — Real-Time SMTP Check

Syntax, DNS/MX, SMTP probe, catch-all, disposable, role-based and typo suggestions — in one sub-second request. 20 verifications/min free. No signup.

Enter an email to verify:

Deep check (SMTP probe)

How it works

1️⃣

Syntax & DNS

RFC-5321 syntax, MX lookup with A/AAAA fallback, retry on tempfail.

2️⃣

SMTP probe

EHLO/MAIL FROM/RCPT TO against the primary MX with MX fallback & deadline.

3️⃣

Grade & verdict

Composite 0-100 score, A–F grade, catch-all and role-based flags, typo suggestion.

What each status means

Status	Meaning	What to do
valid	Inbox exists, mail will accept.	Send safely.
risky	Catch-all / role-based / suspicious pattern.	Send but monitor bounces.
invalid	Mailbox rejected, disposable, or bad syntax.	Remove from list.
unknown	Greylisted / temp fail.	Retry in 15 min.

Examples

test@gmial.com → invalid · suggestion: test@gmail.com
admin@somecompany.com → risky · role-based
junk@mailinator.com → invalid · disposable
xqzabc998877@example.com → risky · likely random local
sundar@google.com → risky · catch-all domain

Frequently asked questions

Is it really free?

Yes. 20 free checks/minute/IP, no signup. Paid plans raise the limit and add batch cleaning.

How accurate is the SMTP probe?

~98% for normal domains. Catch-all domains always accept, so we flag them as risky rather than valid.

What is a deliverability score?

A composite of syntax, DNS, SMTP, catch-all, role-based, disposable and MX-health checks — mapped to a letter grade A–F.

Will my emails be stored?

No. The single validator is stateless. For paid batch cleaning, files are processed in memory and deleted within 24h.

How do typo suggestions work?

We compare the domain to a list of ~60 common providers using Levenshtein distance. gmial.com → gmail.com.

Can I use the API?

Yes. POST /api/validate-email. Grab an API key from your dashboard for raised limits.

What languages / frameworks?

Any HTTP client: cURL, fetch, requests, axios, Guzzle. See API docs.

Need higher volume?

Pro plan at $0.001/email covers 50,000+/month.

Verify thousands at once?

Try Bulk Cleaner →