What Is A Blacklist And How Does It Help Me?

When you validate an email address or a list of email addresses, all invalid email addresses are automatically updated in your personal, account-level blacklist. The next time you validate any email address, it is checked against your blacklist and if found, the verification of that email address is halted as it was found to be invalid earlier.

The blacklist feature helps you save money as repetitive validations of priorly tested and invalid email addresses are not re-validated. This helps you save on credits thereby saving you money.