Be careful how you format e-mail to send to people on the Internet. Not all e-mail systems can handle graphics or formatted text, such as boldface or italics, so that masterpiece of correspondence art that you send to your client may arrive as gibberish. If you don't know what e-mail program the other person uses, go light on the graphics. When sending e-mail to your colleagues on the same office network, or if you're sure that the person you're sending to also has Outlook, any formatting and graphics should look fine.