If you have already made the HTML - add it as an attachment to the mail - they will be able to see it in IE7+ - or upload it to a website and tell them the URL of the site - either way they will be able to see it.
I got a few friends i want to send emails to with some html, sorta like a webpage. What is the best program or way to edit or make an email so when they receive it it comes up with html and looks good?