Use case

Verify an email address without sending email

A mailbox check talks to the server and stops short of a delivery.

That is the whole distinction between a syntax/MX check and a real verifier. If the server accepts the mailbox, we say verified. If it accepts everything, we say catch-all.

Verify an email address without sending email

A mailbox check talks to the server and stops short of a delivery.

Try it — no account needed
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Real lookup against the live mail server — not a sample.

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