The treatment time varies depending on the number of emails in your list. On average we process 10,000 e-mails between 1 and 2 hours. For a Mailing List of 100,000 addresses The verification can be done in less than 8 hours. For 1,000,000 it takes at least 2 days. It will depend on your file and the overload of the service. Don't worry if it takes a time, it's normal.