<!DOCTYPE html>
<html>
<body>
<p>
This is an email link:
<a href="mailto:someone@example.com?Subject=Hello%20again" target="_top">
Send Mail</a>
</p>
<p>The link will only work if you have email installed.</p>
<p>(Spaces between words should be replaced by %20 to ensure that the browser will display the text properly)</p>
</body>
</html>