How do I export my leads from lemlist?

In lemlist, go to Campaigns and open the campaign. Open the Leads list tab, and apply Filters if you need a subset. Tick the top checkbox to select every lead shown, or tick individual leads. Click Export as .CSV in the bulk actions bar. The top checkbox selects only the leads currently shown, so check the count before exporting.

Does a "valid" result mean the person will read my email?

No. Verification tells you whether an address can receive mail, not whether the person reads it, wants it or agreed to it. It cannot detect spam traps either.

What does a risky result mean?

A risky address could not be confirmed as a real mailbox, usually because the domain accepts all mail (catch-all) or the provider will not say. Unconfirmed addresses are never reported as valid. Keep them out of your first send and mail them later, in small batches.

Is there a free way to try this on my lemlist list?

Yes. Sign in with Google and the first 100 addresses are checked free, with results to download and no card. After that, verification is $29.99 a month on the Pro plan.

Clean your lemlist list

Export your leads from lemlist as a CSV, verify every address, then import the valid file back and keep the risky one out of your first send. Verification finds addresses that cannot receive mail. It cannot tell who will read or welcome your email, and an address it cannot confirm is called risky, never valid.

Export steps and bounce rules read from lemlist's own pages, checked 23 Oct 2026.

1. Export the CSV from lemlist

In lemlist, go to Campaigns and open the campaign.
Open the Leads list tab, and apply Filters if you need a subset.
Tick the top checkbox to select every lead shown, or tick individual leads.
Click Export as .CSV in the bulk actions bar.

The top checkbox selects only the leads currently shown, so check the count before exporting.

Source: lemlist help. The shorter version is on the lemlist export page.

2. lemlist's published bounce rule

lemlist alerts at a 10% bounce rate and auto-pauses a campaign at 50%, once 100 or more leads have been contacted.

Source: lemlist help: reduce email bounces, read 23 Oct 2026.

Other platforms' lines are in bounce rate limits by platform.

3. What verification can and cannot tell you

It can tell you

The address is malformed or the domain has no mail servers.
The mailbox does not exist, where the provider answers the check.
The domain is disposable.
The domain accepts all mail, so the address cannot be confirmed.

It cannot tell you

Whether the person reads your email or agreed to receive it.
Whether the address is a spam trap.
Whether a risky address is real. Catch-all domains and providers that hide mailbox status stay unconfirmed.
Whether the contact still works at that company.

Unconfirmed always means risky, never valid. You get three files back, valid, risky and invalid, with your original lemlist columns kept.

4. Import the clean file back

Keep the columns as they came out of lemlist, so the file maps back to the same fields on import.
Import the valid file into lemlist or the tool you send from. Use lemlist's own import help for the exact screens.
Hold the risky file back. If you send to it, send small batches later and watch the bounce rate against the rule above.
Drop the invalid file, or mark those contacts as bad email in lemlist so they are not mailed again.

Check a lemlist address, then your list

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.

Email 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

How do I export my leads from lemlist?: In lemlist, go to Campaigns and open the campaign. Open the Leads list tab, and apply Filters if you need a subset. Tick the top checkbox to select every lead shown, or tick individual leads. Click Export as .CSV in the bulk actions bar. The top checkbox selects only the leads currently shown, so check the count before exporting.
What bounce rate does lemlist allow?: lemlist alerts at a 10% bounce rate and auto-pauses a campaign at 50%, once 100 or more leads have been contacted. Source: lemlist help: reduce email bounces, read 23 Oct 2026.
Does a "valid" result mean the person will read my email?: No. Verification tells you whether an address can receive mail, not whether the person reads it, wants it or agreed to it. It cannot detect spam traps either.
What does a risky result mean?: A risky address could not be confirmed as a real mailbox, usually because the domain accepts all mail (catch-all) or the provider will not say. Unconfirmed addresses are never reported as valid. Keep them out of your first send and mail them later, in small batches.
Is there a free way to try this on my lemlist list?: Yes. Sign in with Google and the first 100 addresses are checked free, with results to download and no card. After that, verification is $29.99 a month on the Pro plan.