How do I export my prospects from Mailshake?

In Mailshake, open Campaigns from the left-side menu. Select the campaigns whose prospects you want. Click Export in the grey menu bar at the top and choose Prospects. When processing finishes, click Download CSV. You can export up to 20 campaigns at a time. Mailshake has no single export of every prospect, so export from the campaigns they were uploaded to.

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 Mailshake 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 Mailshake list

Export your prospects from Mailshake 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 Mailshake's own pages, checked 23 Oct 2026.

1. Export the CSV from Mailshake

In Mailshake, open Campaigns from the left-side menu.
Select the campaigns whose prospects you want.
Click Export in the grey menu bar at the top and choose Prospects.
When processing finishes, click Download CSV.

You can export up to 20 campaigns at a time. Mailshake has no single export of every prospect, so export from the campaigns they were uploaded to.

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

2. Mailshake's published bounce rule

Mailshake does not state an enforcement line. Its deliverability guidance says that if you see bounces higher than 5%, step back to the previous sending limit and wait another week.

Source: Mailshake help: sending cadence and deliverability, 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 Mailshake columns kept.

4. Import the clean file back

Keep the columns as they came out of Mailshake, so the file maps back to the same fields on import.
Import the valid file into Mailshake or the tool you send from. Use Mailshake'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 Mailshake so they are not mailed again.

Check a Mailshake 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.

By continuing you agree to our Terms and Privacy Policy.

Common questions

How do I export my prospects from Mailshake?: In Mailshake, open Campaigns from the left-side menu. Select the campaigns whose prospects you want. Click Export in the grey menu bar at the top and choose Prospects. When processing finishes, click Download CSV. You can export up to 20 campaigns at a time. Mailshake has no single export of every prospect, so export from the campaigns they were uploaded to.
What bounce rate does Mailshake allow?: Mailshake does not state an enforcement line. Its deliverability guidance says that if you see bounces higher than 5%, step back to the previous sending limit and wait another week. Source: Mailshake help: sending cadence and deliverability, 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 Mailshake 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.