Check every email before you send.

Keep valid, invalid and uncertain results apart, and choose which addresses move to the next step.

Check your list

Check before you send.

Give your agent a list from your CRM or an enrichment run. It checks each address with tools such as LeadMagic, Hunter and ZeroBounce, and you decide what each result means.

Browse verification tools
leadmagic logoEmail Validation · LeadMagicYour rules
  • ••••••@microsoft.comValidPass on0.09
  • ••••••@google.comValidPass on0.09
  • ••••••@nvidia.comCatch-allHold for review0.09
  • ••••••@deepline.comInvalidRemove0.09
  • ••••@nvidia.comValidPass on0.09

Find and check in one workflow.

Email enrichment finds an address; verification checks one you have. Some sources check during the lookup, so read that result before paying for another.

Explore email enrichment
  1. 1Remove duplicates
  2. 2Check your suppression list
  3. 3Verify each email
  4. 4Pass accepted rows on
From your CRMWhat happenedCredits spent
••••••@microsoft.comValid, passed on0.09
••••••@microsoft.comDuplicate of the first row0.00
••••••@google.comUnsubscribed, on your suppression list0.00
••••••@nvidia.comValid, passed on0.00
••••••@deepline.comInvalid0.09
••••@nvidia.comValid, passed on0.09

Keep uncertain results separate.

Uncertain is not verified, even when you choose to use it. Verification does not guarantee delivery or inbox placement.

Read the verification guide
VerifiedPassed on
  • ••••••@microsoft.comValid
  • ••••@nvidia.comValid
ReviewHeld, not verified
  • ••••••@nvidia.comCatch-all
  • •••••@google.comUnknown
RemovedKept out
  • ••••••@deepline.comInvalid

Try it with your agent.

Paste this into Claude Code, Codex or any agent with Deepline set up.

/deepline-gtm Check the work emails in my Microsoft contact list. Separate valid, invalid, catch-all, and unknown results. Save the source for each check.

Set up Deepline.

Paste this into your agent once. Then come back for the prompt.

Paste into your agent

+ more
Install and set up the official Deepline CLI globally from npm (package: deepline) by following https://code.deepline.com/INSTALL.md.