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What is Email Validation?

Email Validation checks whether an address can actually receive mail before you spend a send on it. Clarky verifies addresses with ZeroBounce, an industry-standard email verification service, and shows the result as a small status pill wherever emails appear: the People page, contact records, and Prospecting search results. Most importantly, Sequences automatically skip addresses that fail validation, so a stale contact list cannot burn your sender reputation with bounces.
Plan availability: Startup or higher. Email Validation is pay as you go: any paid plan can buy validation credits, and there is no subscription add-on. See Plans & Billing.

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How credits work

Email Validation runs on validation credits, purchased in Settings > Email Validation. One credit validates one address.
Pick a one-time pack of 1,000, 5,000, or 25,000 validations. Credits never expire and are shared by everyone in the workspace. Payment goes through Stripe on the card you already use for Clarky.
A credit is used only when an address is checked for the first time. Results are kept for 90 days, so re-validating the same address anywhere in Clarky during that window is free: launching a second sequence at the same list, re-importing a CSV, or viewing badges costs nothing.
Nothing breaks. Validation quietly pauses, badges stop appearing for new addresses, and emails send without a deliverability check, exactly as they did before this feature existed. Buy credits any time to switch protection back on.

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What the statuses mean

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Where validation shows up

Sequences

The launch preview warns how many target emails are undeliverable, and the dispatcher skips them at send time. A contact stopped for a bad address shows an “Invalid email” status on the sequence detail page. Validation is on per sequence by default; the Email validation switch on the launch page’s Sender section turns it off for that sequence.

People

The People table shows a status pill next to each contact’s primary email, so you can spot unreachable contacts at a glance.

Contact records

Every email on a contact record carries its badge, plus a Validate email action for an instant on-demand check.

Prospecting

Search results are validated in the background, so you know which prospects have a working email before you save them or launch outreach.

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Validating on CSV import

When importing contacts, tick Validate emails after import in the import options. Every new address in the file is checked in the background once the import finishes, so the list is fully badged before you launch a sequence at it.
1

Buy credits

Go to Settings > Email Validation and pick a pack. Credits never expire.
2

Import or prospect as usual

New addresses from imports (with the checkbox on), prospecting searches, and sequence launches are validated automatically.
3

Launch with confidence

The sequence launch preview shows how many addresses will be skipped, and the rest go out clean.
Validation protects the thing that is hardest to rebuild: your sending domain’s reputation. If you run cold outreach from a warmed-up domain, validating a list before the first send is the cheapest insurance you can buy.