Email blacklists contain list of emails for which tracking links result into an invalid click.
Email can be blacklisted manually by user, by API request or automatically by the script if a defined threshold is reached during click registration process.
To enable Email threshold click on "settings" button located in the top-right corner. Next you can set maximum number of clicks allowed in a 24 hour interval. If number of clicks with same email parameter is reached in this interval, it is automatically blacklisted. To disabled threshold set 0 (zero) or empty value into the threshold field.
To blacklist emails using API, click on "api" button located in the top-right corner and you'll be provided with necessary documentation to get started.