The easy way is to use the built-in editor to create a mailto link, but you can do that manually too.

http://www.w3schools.com/TAGS/tryit.asp?filename=tryhtml_link_mailt...

http://www.w3schools.com/TAGS/tryit.asp?filename=tryhtml_link_mailt...

you should also readhttp://www.w3schools.com/TAGS/tag_a.asp...