Today I want to introduce a new WordPress plugin to do email validation on forms. It is called MailboxValidator Email Validator. This plugin did validate email address that inputted by user through any kind of forms, such as contact form, registration forms and so on. The plugin will validate the email in three conditions, which are whether the email is valid, disposable or free. Any email that do not pass the condition will be marked as invalid. Those conditions is optional and the website owner can choose any one of them to do validation. A tutorial had been posted by them to explain how to use it.