We all know that for an email address to work, it needs to be valid. One of the systems that helps us validate a valid email address is the “email address validation” API that’s available from Yahoo. The email address validation API will give us a few details about an email address, including how many times the domain has been used, what domain it was registered under, and the IP address. We can also use the API to do things like check which users are using an email address, check if a specific user has been using an email address for a certain amount of