SMTP Email Validator — Single & Bulk Engine

Single Email Address Test

TARGET EMAIL ADDRESS

TEST CASE PRESETS

SMTP Handshake & Deliverability Report

Ready for Validation

Enter an email address on the left and click "Validate Email via SMTP" to perform a real-time MX DNS lookup, disposable check, and SMTP connection handshake test.

Bulk Email Validation

EMAIL LIST (one per line or comma-separated, max 1000)

0 emails

Bulk Results

No Results Yet

Paste your email list on the left and click "Validate All via SMTP" to begin.

SMTP Gateway & Port Settings

SMTP HELO/EHLO HOSTNAME

MAIL FROM ADDRESS

CONNECTION TIMEOUT (SECONDS)

SMTP PORT

Port 25 Standard Direct Mail Relay Port 587 TLS/STARTTLS — Recommended Port 465 SSL Encrypted Port 2525 Alternative SMTP

High-Performance Dynamic Relay

The validator will attempt EHLO/HELO banner handshakes using the configured hostname and port.

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MX Record Lookup

Real DNS resolution of MX records to find the authoritative mail server for the domain.

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Disposable Detection

Checks against a database of 500+ known temporary & disposable email providers.

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Role Account Detection

Flags functional mailboxes like admin@, noreply@, support@ that aren't personal inboxes.

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SMTP Handshake

Opens a real TCP connection to the MX server and probes the mailbox with RCPT TO.

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Catch-All Detection

Probes a random address to detect servers that accept all mail regardless of the recipient.

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Bulk Processing

Validate up to 200 emails at once with concurrent SMTP checks and CSV export.