Salesforce's email templates are classified as follows:
HTML with letterhead: These email templates are only accessible to administrators and users with the "Edit HTML Templates" permission based on the letterhead.  Salesforce Classes In Pune
Custom HTML: Using a letterhead, users and administrators with the "Edit HTML Templates" access can build these email templates.
Text: Everyone in the organization has access to these email templates, and all users are able to change or create them. Best IT Training Provider