No! Our software is checking each mailbox without ever sending any email to one of the checked addresses!
Depending on the whole set of semantic and technical information an address is providing, our self-learning algorithms decide if the information they give back makes sense. The percentage of the "DataCredibility" indicates, how trustworthy the result is.
Sorry, but definitely the intelligent backend of our software is quite more than just a database containing some names for providing you the most reliable information on every address.