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Free email validator

Enter an email address and this tool checks what can be checked without contacting the recipient: whether it is written correctly, whether the domain looks mistyped, whether it is a shared inbox or a throwaway service, and whether the domain publishes a mail server. It does not confirm that the mailbox exists.

The address stays in your browser. Only its domain is looked up, to see whether it publishes a mail server. This checks the address, not the mailbox.

What this checks, and what it cannot

Shape: the address follows the rules mail servers apply (one @, allowed characters, a domain with an ending).
Typos: the domain is one letter or two away from a popular mail domain, such as gmial.com.
Shared inboxes: names like info@ or sales@ that reach a team rather than a person.
Throwaway services: domains of disposable inbox providers, from a short list that is not complete.
Mail server: the domain publishes at least one MX record, so mail to it has somewhere to go.

What it cannot do is tell you that name@company.com is a real, working inbox. That can only be learned by asking the recipient's mail server, and many servers, large providers above all, answer in ways that prove nothing. This free tool does not try. Warmerly's email verification does go further, on one address or a whole list.

Why the mail server check matters

An MX record names the servers that accept mail for a domain. A domain with none cannot receive email, however convincing the address looks, and a single dot as the MX (a null MX) is how a domain says it never accepts mail. Mail sent to either bounces.

To see the records themselves, with priorities and backups, use the MX record checker.

Shared inboxes and throwaway addresses

Names like info@, sales@, support@ and admin@ usually reach a team or a mailbox nobody owns. They can be perfectly deliverable, but they suit one-to-one outreach badly, because there is no single person to write to.

Disposable inbox services hand out addresses that are meant to be abandoned. This tool knows a short list of the most common ones. A clean result does not rule out a throwaway domain that is not on the list.

Before you send to a list

Addresses that bounce hurt the domain you send from, because mailbox providers read bounces as a sign you do not know your recipients. Remove anything that fails the checks above, then verify the rest properly before a first send. The cold email bounce rate guide covers what bounces cost and how to read the error codes.

Questions

Does a clean result mean the email address is real?

No. It means nothing obviously wrong was found: the address is written correctly, the domain publishes a mail server, and it is not a known throwaway service or a likely typo. Whether the mailbox exists needs a conversation with the recipient's mail server, which this tool does not have.

Why not just check that the mailbox exists?

Many mail servers accept every address and sort out the bad ones later, and large providers do not tell outsiders which mailboxes are in use. A check that cannot be trusted either way is worse than none, so this tool does not claim it.

Is the address I type sent anywhere?

No. The address is checked in your browser. Only its domain is looked up, to read the domain's MX records.

What is an MX record?

A DNS record that names the mail servers accepting email for a domain. Without one, mail to the domain has nowhere to go.

Why does it flag info@ and sales@ addresses?

They usually reach a shared inbox. They are often deliverable, but they are rarely one person, which suits one-to-one outreach badly. It is a warning, not a failure.

Why does it say my address has a possible typo?

The domain is very close to a popular one, such as gmial.com for gmail.com. If the domain is correct as you typed it, ignore the warning.

Does it check whole lists?

No, one address at a time. Warmerly's email verification takes a list.

Check the whole list, not one address.

Warmerly's email verification checks syntax, domain, MX and mailbox on one address or a CSV, and calls out catch-all domains instead of counting them as valid.

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