Email Validator
Verify an email address before you send: syntax check, live MX-record lookup, and disposable-domain detection. No email is sent and nothing is stored.
How it works
The validator runs three checks. First, the address is tested against the RFC-style syntax rules that mail servers actually enforce. Second, the domain is compared against a list of known disposable-email providers. Third, a live DNS lookup confirms the domain publishes MX records — without those, no mailbox at the domain can receive mail. A passing result means the domain can accept email; it does not guarantee the specific mailbox exists, which only an SMTP handshake at send time can confirm.
What the result actually proves
The MX lookup runs over DNS-over-HTTPS against Cloudflare's public resolver with a five-second timeout, and the first three mail hosts found are listed next to the result. Those hostnames are informative on their own: records pointing at Google or Microsoft tell you the domain runs on Google Workspace or Microsoft 365, while an unfamiliar or self-hosted mail host can explain later deliverability quirks. If the DNS query itself fails, the verdict comes back as unknown rather than a failure, so a transient network problem is never reported as a bad address.
The disposable check compares the domain against a fixed list of well-known burner providers, and the syntax test uses the character rules mail servers actually enforce rather than a loose pattern. That combination suits everyday jobs: sanity-checking an address someone typed into a form, cleaning a short list before an import, or confirming a company domain can receive mail before you send outreach. For cleaning a large marketing list, a dedicated verification service that performs SMTP-level and catch-all detection will go further than a single-address DNS lookup.
Frequently asked questions
›How do I check if an email address is real?
Enter the address above and the validator runs three checks in sequence: syntax, disposable-domain matching, and a live MX-record lookup on the domain. A "deliverable domain" result means the address is correctly formed and its domain is configured to receive mail. That is as far as any tool can go without contacting the mail server, so treat it as a strong signal rather than proof the mailbox exists.
›Does this tool send an email to the address?
No. Nothing is sent to the address and no SMTP connection is opened, so the owner is never notified and never receives a test message. The only outbound request is a DNS query for the domain’s MX records.
›What does "no MX records" mean?
It means the domain does not publish any mail-exchange records in DNS, so there is no server anywhere advertising that it accepts mail for that domain. Anything you send to it will bounce. The usual causes are a typo in the domain, a parked or expired domain, or a website-only domain that was never configured for email.
›Can it confirm the specific mailbox exists?
No. Confirming a single mailbox requires an SMTP handshake with the receiving server, and most large providers deliberately answer identically for real and fake addresses to defeat exactly that probe. This validator verifies the domain can receive mail; whether jane@ or john@ exists behind it is only settled when you actually send.
›What is a disposable email address?
It is a temporary inbox from a burner service that expires after minutes or hours, commonly used to get past signup forms without handing over a real address. The validator flags addresses on known throwaway domains such as Mailinator, Guerrilla Mail, and YOPmail. New burner domains launch constantly, so a clean result reduces but does not eliminate the chance you are looking at a throwaway.
›Is the email validator free, and is my data stored?
It is free with no signup, and the address you enter is not logged or stored — it is used for the checks and discarded with the response. Requests are rate-limited to 30 per minute per IP address.