Parse, validate and clean an email address. This API performs the following functions: Syntax Checks - Check if the email address is RFC822 / RFC2822 compliant. DNS Checks - Check if the email address domain resolves correctly and has valid MX (mail exchanger) records. Typo Fixing - Fix common domain, TLD (top-level domain) and freemail email address typos. Freemail Check - Determine if the email address is a freemail registered email address (i.e. not a commercial address)