Note: When using SAS to email graphics output, you must first set the EMAILSYS system option to SMTP and the EMAILHOST system option to the name of the SMTP email server at your site.
Yes it can be a list of emails, just ensure you use the proper delimiter for your software (ie comma or semicolon).
Those are 'system options' I believe in SAS. Check PROC OPTIONS for how to change them. Some options can be changed via code and some need to be changed in the config file.