1.

create a new layer, and select the text tool, then type the on the stage what ever you want the mail link should be, for an example : "Email Us"




now with the Arrow tool select the text (Link), and on the property bar you will find an area where you can directs the mail link to, for an example as shown below on the image, mailto://someones@domain.com

Its done. now press Ctrl+enter and see, the way mail link works. Oh yeah it works smoothly.