On the landing page (before you log in), there's a banner across the top that says "New! Mint Bill Pay. Pay all your bills from one place and avoid late fees." You can click on it to access the Mint Bill Pay site, but I don't see any way to access it from within your regular Mint account once you are logged in, which is why I said it seems like it may not be integrated with your Mint account (and therefore maybe poses no additional security risks?).