Our SMC Styleguide provides directions and examples of proper usage of letterhead for a variety of correspondence and stationary printing needs.
For the details, view our styleguide. And to play it safe, please use our templates set up specifically for emailing a message on letterhead (use the color doc) or for faxing a message (use black and white). Just click and grab the letterhead you need below. Be sure to personalize the contact information, then type away.