sending an email when a user clicks a button

I want to create a trigger that automaticallhy sends and email to our learning and dvelopment team when a user does something in a course but I'm having trouble with the syntax.

If i set the trigger to mail to,  and enter the email address I can get it to launch outlook but it won't populate the send to, subject or body fields.

I want it to send to a particular address with the following

subject - I reviewed the application

body - I'm going to work on the project now

any help with the html would be appreciated.