checkeremail.com

What is an email checker?

An email checker is a free tool that tells you whether an email address is real and able to receive mail — without sending anything to it. Instead of guessing, our checker looks up the domain’s mail servers (MX records) and opens a live SMTP conversation with them, exactly the way a sending mail server would, then asks whether the mailbox exists.

How does email verification work?

Checking an address happens in a few automatic steps:Syntax check — we confirm the address is correctly formed: a valid local part, an “@”, and a real domain.MX lookup — we query DNS for the domain’s mail servers.

What do the results mean?

Valid — the mail server accepted the address; the mailbox almost certainly exists.Invalid — the server rejected the address (550); it does not exist or cannot receive mail.Catch-all — the domain accepts every address, so a single mailbox can’t be confirmed (common on company domains).Greylisted / try later — the server returned a temporary 4xx on purpose; the address may still be valid.Unknown — the server hid the.

Why check email addresses?

Verifying addresses before you use them keeps your contact lists clean and protects your reputation as a sender. Removing invalid and mistyped addresses lowers your bounce rate — one of the main signals mailbox providers use to decide whether your messages land in the inbox or the spam folder.

Is it free and private?

Yes. The email checker is free and needs no account. We do not store or share the addresses you check; they are used only to run the verification you asked for and to show you the result. For repeated checks of the same mailbox we briefly cache the outcome so we don’t contact the mail server again — gentler on everyone’s infrastructure, and faster for you.