What does this email validator check?

We check three things: (1) email format using RFC 5322 rules, (2) whether the domain exists and has DNS records, and (3) whether the domain has MX records configured to receive email.

Can this tool guarantee an email is valid?

No tool can guarantee 100% that an email address is valid without actually sending to it. We verify format, domain, and MX records, which catches most invalid addresses. Some valid-looking addresses may still bounce (e.g., if the mailbox doesn't exist).

MX (Mail Exchange) records are DNS records that specify which mail servers accept email for a domain. If a domain has no MX records, it cannot receive email.

Why do emails bounce?

Common bounce reasons include: invalid email format, non-existent domain, no MX records, full mailbox, or the specific mailbox not existing. Validating addresses before sending reduces your bounce rate and protects your sender reputation.

Email Address Validator

Validate email addresses by checking format, domain existence, and MX records. Reduce bounces by verifying addresses before sending.

Fast & Free Privacy-First No Sign-up Required

Email Address

Frequently Asked Questions

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