Restrict Content Pro allows you to set up notification email templates, but the contents are the same for each membership level. This add-on allows you to customize the different notification emails for each individual membership level so that they each contain different content. Your Gold members can receive one email, while your Silver members receive a completely different one.
The following templates can be customized for each level:
Link to “Configure Emails” on the Membership Levels table
Customizing emails for the Bronze membership level