Questions and answers

One credit checks one email address. Credits are added to your account when you buy them and used when a list is checked.

Pricing is by volume: from $0.010 per address for small purchases down to $0.001 per address from 2,000,000 credits. Every credit in a purchase is charged at the rate for the size of that purchase. A one-time purchase is between 1,000 and 5,000,000 credits. See all pricing tiers.

A plan gives you a set number of credits every month or every year, charged at the same volume rates. Credits are added to your account when each period is paid. You can cancel at any time; the plan stays active until the end of the period you have paid for.

Credit purchases are final and non-refundable, as set out in our terms of service. If something went wrong with a list, email [email protected] and we will look into it.

Card payments are processed by Stripe. Prices are in US dollars.

Twelve things: syntax, duplicates, disposable domains, role accounts, free providers, known litigators, MX and DNS records, parked domains, protected domains, spam-trap patterns, catch-all domains and whether the mailbox exists. How each check works.

No. To check a mailbox we ask the domain’s mail server whether it would accept mail for the address, then disconnect before any message is sent.

A domain whose mail server accepts mail for every address, whether the mailbox exists or not. For these domains a mailbox cannot be confirmed, so they are reported separately so you can decide what to do with them.

They are not necessarily invalid. Role addresses such as info@ are shared inboxes, and free webmail addresses are personal rather than business addresses. They are flagged so you can decide whether they belong on your list.

Yes. You can turn individual checks on or off for each list before it runs.

CSV or TXT files up to 25 MB, with one email address per row in a single column. A header row is detected automatically.

Yes. You can import lists from Mailchimp and Constant Contact and send the results back to them, and export a clean list to Salesforce. About integrations.

A summary of what each check found and a results file with one row per address and its findings, which you can download from your account or send to a connected platform.

Your list is used only to provide the service. Uploaded files may be kept in encrypted form for up to 30 days, as described in our privacy policy. We do not sell or rent your personal information.