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 Webflow Forms 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 Webflow Forms list

Export your form submissions from Webflow Forms 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 Webflow Forms's own pages, checked 23 Oct 2026.

1. Export the CSV from Webflow Forms

In Webflow, open your site's Forms submissions area.
Choose the form whose submissions you want.
Export the submissions as a CSV.

Webflow's help says the CSV holds all submission data for that form and uploaded files appear as URLs. The exact button labels were not confirmed on the help page, so follow the labels you see in the Webflow editor.

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

2. Webflow Forms's bounce rules

Webflow does not send your campaigns, so it has no bounce rule of its own. The rule that matters is the one on the tool that sends the mail you build from this list, such as your email platform or sequencer. As a safe plan, aim for hard bounces under 2%, the lowest enforcement line any platform we read publishes (Brevo).

Source: Bounce rate limits by platform, 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 Webflow Forms columns kept.

4. Import the clean file back

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

Check a Webflow Forms 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 form submissions from Webflow Forms?: In Webflow, open your site's Forms submissions area. Choose the form whose submissions you want. Export the submissions as a CSV. Webflow's help says the CSV holds all submission data for that form and uploaded files appear as URLs. The exact button labels were not confirmed on the help page, so follow the labels you see in the Webflow editor.
What bounce rate does Webflow Forms allow?: Webflow does not send your campaigns, so it has no bounce rule of its own. The rule that matters is the one on the tool that sends the mail you build from this list, such as your email platform or sequencer. As a safe plan, aim for hard bounces under 2%, the lowest enforcement line any platform we read publishes (Brevo). Source: Bounce rate limits by platform, 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 Webflow Forms 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.