Business rules - notification rules - email different users

Business rules - notification rules - email different users

Guys, 

I'm frustratingly busy trying frantically to get something quite simple done:

I create a business rule that triggers when a new request is created by someone specific, and with a certain subject. If a request matches those rules and is created: then send an email to about 15 different users in my corporation - that's it. 

I fail where email addresses or contacts must be typed in. I cannot type in a single email address.

It seems as if the application is hindered so much that nobody but technicians or certain 'roles' in SDP can be mailed to, but not to normal requesters. 

What i am trying, is that possible please?