HTML Code:
<form action="mailto:me@mydomain.com" method="post">
<input type="text" name="foo" />
<input type="text" name="bar" />
<input type="submit" value="Submit" />
<input type="reset" value="Reset" />
</form>
This will open up users e-mail client and put your email address to the TO field and the form fields as the body. You can also add subject like this
HTML Code:
<form action="mailto:me@mymail.com?subject=Subject">
If you want something more you have to code it with something else than HTML.