You can upload up to a million emails in a single file completely for free! We'll show you the statistics, and you can decide whether you want to pay to download the full list or not.

If your entire list is already clean, you don't pay a penny!

Our highly parallelized systems have no limit on their processing speed, but generally the processing time increases the more your list is targeting the same email servers, e.g. if the entire list has the same domain name like gmail.com.

You can generally expect between 100k to 200k verifications per hour, and in the worst case scenario when the entire list targets the same server, about 25,000 verifications per hour.

Catch-all domains are domains which accept any username in the email address. For example, catch-all-domain.com may accept mail from an arbitrary username in an email address like this-does-not-exist@catch-all-domain.com.

We detect email addresses under domains like these for you in case you'd like to avoid sending mail to them, since this could be an indicator of a low-quality recipient.