The Scottish Tourist Board, known as VisitScotland, deals with enquiries made by post, email and telephone. You can request, online and by phone, for regional brochures to be posted to you, or download them from the website.
Most larger towns have tourist offices ('information centres') that open 9am or 10am to 5pm Monday to Friday, and on weekends in summer. In small places, particularly in the Highlands, tourist offices only open from Easter to September.
If you want to email a tourist office, it's [insert name of town]@visitscotland.com.