You can do a basic one like this, but it will be fodder for spam bots:
Code:
<a href="mailto:You @yourdomain.com">Text of Email link</a>
Or you can do one like this with JavaScript (my personal preference):
Code:
<script language="JavaScript" type="text/javascript">
<!--
document.write("<A HREF='mailto:"+"you"+"@"+"yourdomain.rr.com"+"'>"+"Contact"+" Us"+"</A>");
//-->
</script>
Heck, take advantage of DW's interface so you don't have to learn a bunch of coding... just my opinion.
PS, the first one is the basic that you get when you use Insert > Email Link option in DW... the 2nd one is code you need to enter manually.