1) The software should be windows based
2) It should be able to identify if an email id exists (for atleast the top 10 free email domains, i can provide the domain list). So the output should give the email address and whether it exists or not.
3) It should accept email addresses in a batch mode (atleast 50 at a time). These could be fed as a text file one email address per line.
4) I am expecting 100% accuracy on the results (for the given domains).
If you want a use case.
Imagine two email addresses email@example.com & firstname.lastname@example.org
Obviously, the first one exists whereas the second one does not exist. Although the domain name and syntax are accurate. The application should be able to say that first one exists and the second one does not.
Give me a high level sense of how much this will cost. The gui need not be pretty.