What is an Email Validator?
An email can be well-formed and still undeliverable — the domain decides. Real validation checks both: the format, and whether MX records exist to receive mail.
The syntax check runs locally; the MX check queries live DNS. What no tool can promise is whether the specific mailbox exists — only the receiving server knows that at delivery time, and we say so instead of pretending.
How to use the Email Validator
- Enter the address.
- Read the format verdict and the domain’s MX result.
- Treat “no MX records” as will-bounce.
Frequently asked questions
Can any tool verify a mailbox exists?
Not reliably — servers deliberately don’t reveal it (to block address harvesting). Services claiming 100% mailbox verification are overselling.
What are MX records?
DNS entries naming the servers that accept mail for a domain. No MX (and no fallback A) means mail cannot be delivered.
Why validate before sending?
Bounces hurt your sender reputation — enough of them and real recipients stop getting your mail.
Is the address I type stored?
No — only the domain part is looked up in DNS; nothing is retained.