Email Confirmation Flow Implementation

I need the email field on https://realvestors.com/liquidcash.htm to run a proper confirmation cycle. The moment a visitor submits the form, the script should: 1. Validate the address syntax (accept every domain, no whitelists or blacklists)... (Budget: $30 - $250 USD, Jobs: cPanel, Email Marketing, HTML, JavaScript, Linux, Node.js, PHP, Web Development)