Free tool · runs in your browser

Email address validator

Paste one or more addresses to check syntax, confirm the domain can receive mail (MX lookup over DNS-over-HTTPS), and flag role-based mailboxes and disposable domains — a quick list-hygiene pass before you send. It doesn't probe mailboxes, so nothing is sent and nothing is stored.

Email addresses (one per line, up to 50)

Summary

Address	Syntax	Domain MX	Flags	Verdict

This checks deliverability prerequisites, not mailbox existence. Confirming a mailbox requires SMTP probing, which this tool deliberately does not do.

Email validator FAQ

What does this email validator check?+

Three things per address: syntax (a practical RFC-style check), whether the domain has MX records so it can receive mail at all (looked up over DNS-over-HTTPS), and risk signals like role-based mailboxes (info@, admin@) and disposable domains. It's a fast pre-send hygiene pass for a list.

Can it confirm the mailbox actually exists?+

No — and be wary of any free tool that claims to. Truly confirming a mailbox requires SMTP probing the receiving server, which is unreliable, often blocked, and can itself harm your reputation. This tool checks the deliverability prerequisites (valid syntax + a domain that can receive mail) without sending anything.

Why flag role-based addresses?+

Addresses like info@, support@ or admin@ are shared mailboxes. They tend to generate more complaints and unsubscribes and are less likely to represent a single consenting recipient, so many senders treat them with caution on marketing lists.

Should I remove disposable-domain addresses?+

Usually yes for marketing. Disposable/temporary domains (used to dodge signups) rarely belong to engaged recipients and inflate bounces and complaints over time. Keep them out of your sending list to protect reputation.