email with resources from within SL/Rise

The best that you can do is invoke the default mail application on the learner's PC. Sending an email "behind the scenes" requires a webserver with an SMTP/POP3 mail server installed, and server-side scripting (e.g., ASP/VBScript, PHP) to generate and send the email. Matthew Bibby's Tutorial: Populating an Email with Content from Storyline, covers quite a lot of ground for how to populate a client-side email.

As each LMS is different, and what data an organization populates (or doesn't populate) the learner-dedicated fields with will be different, retrieving the learner's email address is going to be a hit-or-miss proposition. One organization I worked for populated cmi.core student_id with the Employee ID, another populated it with the mainframe login ID, and a third populated it with the employee's email address.