Built for the person who presses send

Email Verification for Email Marketers

The list you are about to send to is older than you think.

Addresses decay quietly. People change jobs, close mailboxes, and mistype at signup, and none of that shows up until the campaign is already out. Verifying first turns an unknown risk into a number you can look at before you commit your sending reputation to it.

Start with 100 free credits View pricing

10M+ verifications · 99.5% accuracy · 4.9/5 rated · No credit card required

ClearBounce mascot in front of a campaign dashboard, an email list being sorted into deliverable, risky and undeliverable groups before a send

What we found in 807,203 verifications · H1 2026

75.9%

Deliverable

10.2%

Invalid

8.7%

Risky

8.1%

Catch-all

80% of the lists we processed were at least 20% unusable. See the full benchmark data

What verification changes on the day of a send

Not the abstract case for clean data — the specific things that go differently when the list has been checked first.

Your bounce rate stops being a surprise

Across 807,203 addresses we verified in the first half of 2026, one in ten was outright undeliverable. On an unverified list that share arrives as bounces, after the send, in front of the mailbox providers who are grading you.

Open and click rates start meaning something

Rates are calculated against delivered mail. Strip out addresses that were never going to receive anything and the numbers describe your audience instead of your data quality.

You stop paying to store dead contacts

Most platforms bill on list size. Addresses that cannot receive mail cost the same as the ones that can, every month, until somebody removes them.

Spam traps and role accounts get flagged

A recycled trap or a stale info@ box does more damage than a plain bounce, because it goes into the provider's judgement of your sender reputation rather than just your report.

You do it where the list already lives

Connect Mailchimp, Brevo, ActiveCampaign, HubSpot and the rest, verify in place, and skip the export-clean-reimport round trip that loses your segments.

Credits do not expire

Buy for the seasonal spike and use the remainder in March. Nothing burns at the end of the year, so you are not budgeting against a countdown.

When it is worth verifying first

You do not need to verify before every newsletter. These are the moments where skipping it is what costs you.

Before a re-engagement campaign to a list that has been sitting still — this is the single riskiest send most teams make

Before migrating to a new ESP or CRM, so you import a clean list rather than paying to store the dead part of the old one

While warming a new domain or IP, when every early bounce weighs disproportionately

Ahead of a seasonal or launch campaign that hits the whole database at once

After a burst of signups you cannot explain, which is either a good week or a bot

When bounce rates or inbox placement have moved and nobody can say why

When a list arrives from somewhere else — an acquisition, an event, a partner, an agency handover

A breakdown you can act on, not a single number

Every address comes back labelled, and the labels carry a reason. That matters because the four groups need four different decisions, and a tool that collapses them into "good" and "bad" makes that decision for you.

Deliverable — send. This is the part of your list that is genuinely reachable.

Undeliverable — suppress. The mailbox or the domain rejected it outright.

Risky — disposable, role-based, catch-all, a likely typo, or an ambiguous answer. We do not recommend sending to these.

Unknown — the provider would not answer usefully. Worth re-checking later rather than deleting.

See the full benchmark data

A subscriber list flowing through a verification step on its way into an email marketing platform

Getting there without a data project

Verification is only useful if it fits into the week you actually have.

Upload a CSV

Drag the export in, get a labelled file back with every address, its status and the reason behind it. Filter it in the tool you already use for everything else.

Or connect your platform

Pull the list straight out of Mailchimp, Brevo, ActiveCampaign, GetResponse, MailerLite, AWeber, Moosend or HubSpot, verify it, and push the result back without touching a spreadsheet.

Stop the problem at the form

ClearBounce Shield checks the address while the visitor is still on the page, so tomorrow's list does not need the same cleanup as today's.

Watch the sending side too

The Deliverability Kit checks SPF, DKIM and DMARC and monitors your domains and IPs against the major blocklists, which is the other half of the reason good mail does not arrive.

Works with the tools you already send from

Connect your platform and verify the list where it already lives, or use the API and skip the export entirely.

See all integrations

Pay for what you verify, keep what you do not use

Verification demand is rarely flat. It spikes when you migrate, when a season starts, when a list arrives. Pricing that assumes a steady monthly volume charges you for the quiet months too.

Credits never expire. Buy for the spike, use the balance whenever it comes up next.

From $4 per 1,000 emails pay-as-you-go, or save 20% on a subscription if your volume is predictable.

100 free credits on signup, no credit card required.

Start free

100 credits

Enough to verify a real sample of your list and see the result breakdown before you spend anything.

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Questions marketing teams ask

How often should I clean my list?

Email addresses go stale at roughly two percent a month as people change jobs and abandon mailboxes. For a list you mail regularly, a full pass every six months keeps up with that; for one that sits between campaigns, verify before each send rather than on a schedule.

Will removing addresses hurt my numbers?

Your list size drops and your rates improve, because both are measured against mail that was actually delivered. The addresses you remove were not receiving anything — they were only being counted.

What should I do with risky addresses?

We do not recommend sending to them. Risky covers several different problems — disposable domains, role accounts, catch-all servers, likely typos — so if the segment is large, look at the sub-status before deciding. A typo can be corrected; a disposable domain should simply go.

Do you integrate with my email platform?

We have direct integrations for Mailchimp, Brevo, ActiveCampaign, GetResponse, MailerLite, AWeber, Moosend, HubSpot, Salesforce and Instantly, plus Zapier and Make for anything else. There is also a WordPress plugin for forms.

Can I try it on part of my list first?

That is what the free credits are for. New accounts get 100 with no card required — enough to run a real sample of your own list and see the breakdown before you decide whether the rest is worth verifying.

My emails are landing in spam even though the list is clean. What now?

Then the problem is on the sending side rather than the list. Check that SPF, DKIM and DMARC are aligned for the domain you send from, and whether that domain or its sending IPs are on a blocklist — both are in the Deliverability Kit, and we wrote up the whole diagnostic path in the blog.

Related reading: How to clean an email list Verified emails still going to spam The sender reputation guide

Also on ClearBounce

Developers

A plain REST endpoint, a real OpenAPI spec, and every check in the response.

Enterprises

High volume, a published DPA, and no twelve-month commitment.

Partners

Recommend ClearBounce and earn a recurring share of every account you bring.

Non-Profits

Free verification credits for registered nonprofits, because the donor list matters.

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