Email Checker

Check if any email address is valid, deliverable, and safe to send to. SMTP-level accuracy in under 2 seconds — 100 free checks every day.

Free Email Checker

Check Any Email, Instantly

Enter any address and get a full validation report in under 2 seconds. Syntax, domain, MX records, SMTP, disposable detection, and role account check — all in one result.

Under 2 secondsNo signup requiredSMTP-level accuracy
Get Started for Free
BillionVerify free email address checker result screen

What Every Check Includes

Six layers of validation run automatically on every address.

Syntax Validation

Checks format and structure for typos, invalid characters, and malformed addresses.

Domain Check

Verifies the domain exists and is configured to receive email.

MX Record Lookup

Confirms active mail server records are present for the domain.

SMTP Verification

Connects directly to the mail server to confirm the mailbox accepts mail.

Disposable Detection

Flags temporary email services from a database of 10,000+ known domains.

Role Account Check

Identifies generic addresses like info@, support@, and admin@ that hurt engagement.

How It Works

Four verification layers run in sequence on every check.

Format Check

Validates email syntax and detects common typos or malformed addresses.

Domain Lookup

Checks domain existence and resolves MX records to confirm mail delivery is possible.

SMTP Handshake

Connects to the mail server and tests whether the mailbox accepts incoming mail.

Risk Scoring

Scores the address for disposable, role, catch-all, and spam trap risk.

<2s

Response Time

Average SMTP verification

99.9%

Accuracy

Multi-layer validation

100

Free Daily Checks

No signup required

6

Validation Layers

Per address checked

Frequently Asked Questions

1. How does the email checker work?

Verification runs through multiple steps automatically. First, we check the email syntax for formatting errors. Then we look up the domain's MX records to confirm it can receive mail. Finally, we connect to the mail server to verify the mailbox exists — all in under 2 seconds.

2. How accurate are the results?

Our email checker achieves 99.9% accuracy by combining syntax validation, DNS lookups, MX record checks, and direct SMTP verification. This multi-layer approach catches issues that basic validators miss.

3. Is this really free?

Yes. You get 100 free email checks every day with no signup and no credit card required. The free tier includes every verification feature — syntax, domain, SMTP, and disposable detection.

4. Can I check multiple emails at once?

The free checker handles one address at a time. To verify thousands at once, sign up for bulk verification — upload a CSV and download cleaned results in minutes.

5. Do you store the emails I check?

No. All checks happen in real time and we never store the email addresses you submit. Verification data is encrypted in transit and deleted immediately after processing.

6. Does it detect spam traps?

Yes. Our checker identifies known spam traps, honeypot addresses, and other high-risk emails that could damage your sender reputation. This protection is included free with every check.

7. How do I check an email address?

Enter any email address in the checker above and click Verify. Results arrive in under 2 seconds. The check covers syntax, domain existence, MX records, SMTP mailbox confirmation, disposable email detection, and role account identification — all in one step. To check email addresses in bulk, upload a CSV after signing up.

8. How do I check if an email is valid?

An email is valid if it passes four tests: correct syntax, an existing domain with MX records, and a live mailbox that accepts mail at the SMTP level. Our email checker runs all four checks automatically and tells you whether the address is deliverable, risky, or invalid. You can also use the email verification API to check email addresses programmatically in your app.

Free Email Checker

Check Your First Email Free

100 free checks daily. No signup, no credit card. Full SMTP verification on every address.

100 free checks daily · No signup required · Results in under 2 seconds

99.9%
Accuracy
Real-time
API Speed
$0.00014
Per Email
100/day
Free Forever