how to open a new outlook email from interface

Hi there,

I want to put a link like "submit a help ticket" in an interface, when user click the link, then a outlook new email will be open, and have the default subject and recipient email address, I know it's easy to do it in the HTML like 

<a href="mailto:xxx@gmail.com?subject=yyy">help ticket</a>

but I dont know how to do it in Appian. could anyone here know how to do it?

Best regards,

L