New Feature: Support for Custom User Domains

The number one requested feature from both paid users and free trial users has been the ability to use your own domain for your disposable email addresses. You can now configure an unlimited number of domains for use with NullBox. This new functionality comes as part of a new plan level I've added, NullBox Plus. As a thank you for early adopters I've upgraded existing paid NullBox Basic plan users to Plus for free.