Description from the publisher
iToolz is a program for domain verification and DNS resolving. It includes a Domain MX verifier, IP to Host lookup and a Catch-all verifier. The Domain MX checker performs MX lookups on a list of domains and tells you which ones that can accept emails. The RDNS checker resolves IP to Host and can save the results in several different ways. The Catch-all verifier finds out which domains that accepts emails to random usernames on that domain.