Email address validator — check any address instantly
More than a syntax check. Mailbeam validates syntax, MX records, SMTP mailbox existence, disposable detection, and role identification — all in one request.
- What is an email validator?
- An email validator decides whether an email address is worth sending to. Checking the format is only the first step: an address can be perfectly well-formed and still have no mailbox behind it. Mailbeam validates the syntax, then looks up the domain's MX records, opens an SMTP conversation to ask whether the mailbox exists, and checks the domain against disposable, role-based and catch-all lists before scoring the address.
10 free verifications per day · No signup required
What Mailbeam checks
Every verification runs 7 checks in parallel and returns a structured result in under 100ms.
Beyond regex — real validation
A regex can check email syntax. Mailbeam checks whether the mailbox actually exists by connecting to the mail server.
7 checks in one request
Syntax, MX record, SMTP, disposable, role-based, free provider, and catch-all — all returned in a single structured response.
0-100 deliverability score
Each check contributes to a weighted score. Use the score to build your own thresholds and business logic.
Typo correction
Detect and suggest corrections for common domain misspellings before users submit the form.
Free tool, no signup
Use the free verifier to validate individual addresses manually, or integrate via API for programmatic access.
EU-hosted, GDPR-compliant
All validation processing within EU infrastructure. Real-time verification stores no addresses; batch lists are deleted after 72 hours.
How it works
Syntax check
Validates the email format against RFC 5322. Catches missing @, invalid characters, and malformed domains instantly.
MX record lookup
Queries DNS to confirm the domain has valid mail server records. If there's no MX record, the domain cannot receive email.
SMTP verification
Connects to the mail server and simulates a delivery attempt without sending a real email. Confirms the specific mailbox exists.
Quality checks
Detects disposable email services, role-based addresses, and free email providers. Returns a composite score.
When to use it
Form validation
Validate email fields in registration, checkout, and contact forms before accepting the submission.
API integration
Call the validation API programmatically from any backend language. One endpoint, JSON in and JSON out — no client library needed.
Manual lookup
Use the free tool to check a specific email address without writing any code.
Lead qualification
Score and filter leads based on email quality before importing them into your CRM or marketing platform.
Frequently asked questions
What's the difference between email validation and email verification?
Email validation typically refers to format checking (syntax, MX records). Email verification goes further — it performs an SMTP handshake to confirm the specific mailbox exists. Mailbeam does both.
Can I validate emails in bulk?
Yes. The free tool validates one email at a time. For bulk validation, use the batch API endpoint, which handles up to 500,000 addresses per job.
Is the free tool really free?
Yes. The free tool allows 10 validations per day with no account required. For more, the free API tier includes 1,000 verifications per month.
Does validation work for all email providers?
SMTP verification works for most mail servers. Some providers (notably Google and Microsoft) block direct SMTP probes — for those, Mailbeam uses domain-level checks and historical data to estimate deliverability.
Ready to integrate?
Free tier includes 1,000 verifications/month. No credit card required.