Will checking my list email my contacts?
No. We check whether an address is real without ever sending a message to it. Your contacts never see anything.
How much does it cost?
Checking one email costs 1 credit. You start with 50 free credits, and you only pay for what you use. There is no subscription.
Do credits expire?
Never. Whatever you buy stays in your account for as long as it is open.
Can I get a refund?
Yes — within 30 days of a purchase, for any credits you have not used yet. Just ask.
What file should I upload?
A CSV file works best, up to 100 MB. You can also paste your addresses in, or import them from a connected tool like Mailchimp or Brevo.
How long do you keep my list?
Uploaded lists are deleted automatically 30 days after a check finishes. Export your results if you want to keep them.
Can I check a really big list?
Yes. You can upload files up to 100 MB, and for very large lists (up to a million addresses) you can use our API.
Is there an API?
Yes — you can check emails from your own app or website. See the API & developers section.
Tip
Cannot find your answer? Each section of this help center goes deeper, and you can always contact us for a hand.
Did this help?
If you still have a question, we are happy to help.