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Email Account Checker

Check whether an email address actually exists, has an active mailbox, is deliverable, or is a temporary/disposable burner address. Includes DNS MX, SMTP handshake verification, and SPF/DMARC checks.

Quick Test::
Processing... Mailbox en MX-records verifiëren...

About this tool: Email Account Checker

Check whether an email address actually exists, has an active mailbox, is deliverable, or is a temporary/disposable burner address. Includes DNS MX, SMTP handshake verification, and SPF/DMARC checks.

Verify the authenticity, deliverability, and mailbox existence of any email address before sending. Reduce bounce rates, prevent fraud, and keep your email lists clean.

Belangrijkste Toepassingen & Voordelen

  • Verify customer email addresses during registration to prevent fake accounts.
  • Clean newsletter and CRM lists to prevent bounce rates and preserve domain reputation.
  • Detect disposable and temporary email addresses on sign-up forms.
  • Verify business email addresses and detect catch-all mail configurations.
Handige Tip & Best Practice: Maintaining an email bounce rate below 2% is critical for email deliverability. High bounce rates can trigger automatic blacklisting by Gmail, Microsoft, and Yahoo.

This online diagnostic utility is powered by ToolPing to provide fast, reliable, and secure network analytics for sysadmins and developers.

Frequently Asked Questions (FAQ)

How does the email checker verify if an address really exists?

Our tool performs real-time RFC syntax validation, verifies domain MX DNS records, and initiates a direct SMTP handshake with the recipient's mail server without sending an actual email.

Will the recipient receive an email or notification?

No, absolutely not. The tool sends an SMTP handshake (EHLO, MAIL FROM, RCPT TO) to query mailbox validity and disconnects with QUIT before any email content or data is transmitted.

What does a Catch-All server mean?

A Catch-All server accepts all incoming messages for the domain regardless of the username. While the email is deliverable, individual inboxes are routed internally by the domain's server.

What is a disposable or burner email?

Disposable emails are temporary inboxes (like Mailinator or GuerrillaMail) used to avoid spam. Our checker flags these so you can protect your sign-up forms and email lists.