Promo box button link to nowhere

Is there a way to have a promo box button link to nowhere? My ideal is to have the button have a link to an email address and open a new email (or give the option upon clicking of opening an email client). I can get this to work in Firefox, but not in Chrome. Since I can’t get it to work in Chrome, the second best thing is simply have the button not be a link. When I put nothing in the button link field or put an “#” , the button links to the top of the page.