Trumail is a product that was built with the intention of providing an easy to use API to software professionals who value a quality audience. Your apps registration workflow is one of the most important and complex parts of your software and it's very important that you filter user credentials in a way that allows for future use. Invalid user credentials, particularly email addresses, should be deemed valid and deliverable at the time of signup - That's where we come in.
By using Trumail you're handing a very large part of the heavy lifting involved in account registration over to us. On our back-end we process email addresses and make several informed decisions as to the validity of an address. We then bundle up all the metadata we have collected and send it back to you in a JSON or XML blob. This way, you can make an informed decision on how to proceed with registering new users.