Email Validator
Check any address with real checks: strict syntax validation, a live DNS MX lookup, disposable-domain and role-account detection, and typo suggestions — one address at a time or up to 100 in bulk.
Features
Strict syntax validation (pragmatic RFC 5322, 320-character cap)
Live DNS MX lookup, server-side, with the number of mail servers found
Disposable-domain and role-account detection (info@, support@, noreply@ and more)
Typo suggestions for the most-typed mail domains, with one-click copy of the corrected address
Bulk validation of up to 100 addresses, deduplicated, with a progress bar and summary counts
CSV export of results (RFC 4180, with spreadsheet formula-injection guarding)
How to Use
Type an address, or switch to Bulk list and paste up to 100
Click Validate — the MX lookup runs live against DNS
Read the verdict and the per-check chips
Copy the corrected address if a typo was spotted
Download the CSV of bulk results if you need it
Use Cases
Frequently Asked Questions
- How can I check if an email address is valid without sending an email to it?
- Two checks get you most of the way: syntax (does the string parse as an address) and DNS (does the domain publish MX records, meaning it is set up to receive mail). This tool runs both live, plus disposable, role-account and typo checks. The one thing no tool can prove without sending is that the specific mailbox exists.
- What is a catch-all domain and why can't it be fully verified?
- A catch-all domain accepts mail for every address during the SMTP handshake and sorts out the invalid ones afterwards. That defeats every verifier — including paid SMTP-probing services — because the handshake answers yes regardless of whether the mailbox is real. It is a structural limit of verification, not a gap in any one tool.
- What's the difference between syntax, MX record, and SMTP verification?
- Syntax checks the grammar of the string. An MX lookup asks DNS which servers accept mail for the domain. SMTP verification goes further and asks that server about the specific mailbox — a step this tool deliberately skips, because catch-alls and greylisting make the answers unreliable and unsolicited probing looks like spammer behavior.
- How accurate are free email checkers compared to paid ones?
- Paid services like ZeroBounce, Hunter or Verifalia add SMTP handshakes and spam-trap or abuse-list detection, metered behind accounts and credits. This tool's scope is narrower — format, live MX, disposable and role detection — but it is signup-free and honest about the boundary: no checker, free or paid, can fully verify a catch-all domain.
- Why do valid-looking email addresses still bounce?
- Common reasons: the mailbox was deleted or is full, the domain is a catch-all that accepted then bounced, greylisting deferred the first attempt, or there is a typo in the local part of a real domain (jhon@ instead of john@). Format and MX checks cannot see any of those, which is why this tool never labels an address 'deliverable'.
- Is there a limit on how many addresses I can check?
- A fair-use cap of 20 requests per minute. Bulk runs are batched 25 addresses per request, so a full 100-address list completes in 4 requests, comfortably inside the cap. Your list is processed in memory and never stored.
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Need a Temporary Email?
Get your free temporary email address to use with this tool.