Verify email addresses with format, MX record, disposable and typo checks
Email Validator checks whether an email address is real and deliverable before you ever send to it. It runs a layered inspection: RFC 5322 syntax parsing of the local part and domain, a DNS lookup for MX (Mail Exchanger) records on the domain, and a match against a maintained list of disposable and throwaway providers like mailinator.com and 10minutemail.com. It also flags role-based addresses (info@, admin@, support@) that often bounce or auto-respond.
It's built for developers wiring up signup forms, marketers cleaning a mailing list before a campaign, and support teams verifying a customer address. Paste a single address for a quick check, and the tool reports each signal separately so you can decide your own accept/reject threshold instead of getting a single opaque yes or no.
Validation happens in stages, cheapest first. Syntax checking parses the address into a local part and a domain per RFC 5322: it verifies there is exactly one @ sign, the local part uses permitted characters, and the domain is a well-formed hostname. An address like "user@@example.com" or "user@example" (no TLD) fails here without any network call.
If the syntax passes, the tool queries DNS for the domain's MX records, which name the servers responsible for accepting mail. A domain with no MX record and no fallback A record cannot receive email, so the address is undeliverable even if it looks perfect. This catches typos in domains and dead domains that syntax alone would accept.
Finally, the domain is compared against a curated disposable-provider list and the local part against common role prefixes. Note that these DNS-level checks confirm the domain can receive mail, not that the specific mailbox exists. True mailbox verification would require an SMTP RCPT TO probe, which most mail servers now block or answer unreliably, so the safest confirmation is still sending a double opt-in confirmation email.
No. It confirms the address is syntactically valid and that the domain has MX records able to receive mail. Verifying a specific mailbox requires an SMTP probe that most servers block, so use a confirmation email for absolute certainty.
An MX (Mail Exchanger) record is a DNS entry that tells senders which servers accept mail for a domain. If a domain has no MX record (and no fallback A record), it cannot receive email at all, so the address is undeliverable.
Disposable emails come from throwaway services like mailinator.com, 10minutemail.com, or guerrillamail.com that generate temporary inboxes. The tool matches the domain against a known list and flags it so you can block them from signups if you choose.
Those are role-based addresses tied to a function rather than a person. They often forward to multiple people, auto-respond, or bounce, which hurts campaign deliverability, so the tool flags them as a separate warning rather than an outright rejection.
Yes, it is completely free with no signup. Syntax parsing runs in your browser, and the only data leaving your device is the domain needed for the DNS/MX lookup. Addresses are not stored, logged, or added to any list.
This tool is designed for checking one address at a time for interactive use, such as a signup form. For large lists, run each address individually or use the underlying checks (syntax, MX, disposable) in your own batch script.
Passing validation means the format is legal and the domain can receive mail, not that the individual mailbox is active or has space. Mailboxes can be full, disabled, or nonexistent, which only becomes visible when you actually send.