Email Validator

Email Validator: what it is for

Paste one or many email addresses, one per line, and the tool checks the syntax, whether the domain exists and has mail servers (MX), flags temporary and disposable emails like Mailinator and 10 Minute Mail, marks role addresses like info@ and sales@ and suggests fixes for common typos such as gmial.com and hotmal.com. The chart shows how many are valid, risky and invalid.

The emails never leave your browser: only the domain is looked up in DNS.

How to use

1. Paste the emails, one per line.
2. Tap Validate.
3. Fix typos with the suggestion or remove the invalid ones.

When to use it

• Clean a contact list before sending a newsletter.
• Check a customer's email before sending a quote.
• Block sign-ups with disposable emails.

Frequently asked questions

How does the tool know an email is valid?

It checks the syntax of the address, queries the domain's DNS to see if it has mail servers (MX records), compares it with a list of temporary email services and looks for typos in the most common providers.

Does it guarantee the mailbox exists?

No. Knowing whether a mailbox exists requires talking to the mail server, and most providers won't say, to prevent spam. The tool guarantees the address is well formed and that the domain can receive email, which already removes most wrong addresses.

What is a disposable email?

Temporary addresses, like those from Mailinator or 10 Minute Mail, that disappear after a few minutes. People use them to sign up without giving their real email.

Are the emails I type sent anywhere?

No. Everything is checked in your browser. Only the domain (the part after the @) is looked up in Cloudflare's public DNS.

Is it really free?

Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 are free.

Similar tools