Mailcheck is an amazing email validation tool with an API integration feature. It makes it simple to verify emails. We just drag and drop a list and they pretty much take care of everything else. It helped clean up the list and improve deliverability. Mailcheck is incredibly accurate, easy to use, and the customer service was exceptional. The API makes validating a lot of emails within a spreadsheet very easy. Mailcheck is well worth the investment. Don't miss this deal! Grab yours now!