Clean your newsletter list before it costs you
Pick your platform for the export steps from its own help centre, what it does with bounces, the bounce limits it publishes (or says it does not), a calculator for what a dirty list costs on its price list, and how to import the clean file back. The first 100 checks are free.
Sources read 23 Oct 2026.
Try it on a subscriber address
Type any address. It gets the same check the paid plans run: syntax, the domain’s mail servers and, where the provider allows it, a live mailbox check. Nothing is sent to the address.
Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.
Have a list? Sign in with Google and the first 100 addresses are checked free, with results to download. No card.
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Common questions
- Why clean a newsletter list?
- Dead and fake addresses bounce, and bounces count against your sender reputation and, on some platforms, your account. Several platforms also bill by list size, so removing dead addresses can lower the bill. It does not fix a list of people who never agreed to hear from you.
- Is a bounced or unconfirmed address safe to keep?
- A hard-bounced address should stay suppressed. An address verification cannot confirm is reported as risky, never valid, and is best held out of your first send.
- Does email verification find inactive subscribers?
- No. It checks whether an address can receive mail, not whether anyone reads it. Use your platform's engagement segments for inactive subscribers.