To create a link that sends an e-mail to somebody, use the HTML mailto: tag.
Your code will look like this:
<a href="mailto:webmonkey@wired.com>Send an e-mail to Webmonkey</a>
and tell us how much you love cats. Your result will be this below
Send an e-mail to Webmonkeyand tell us how much you love cats.
When the reader clicks on that link, their default e-mail application will launch and a blank e-mail addressed to webmonkey@wired.com (or whatever address you put in the link) will open up.
You can fill out a subject for them, too. Just throw a ?subject= into your code. Your markup will end up looking something like this:
<a href="mailto:webmonkey@wired.com?subject=I-love-cats-too!">Jon</a>, a Webmonkey writer, adores cats.