The use of electronic mail has grown explosively in the past decade. A recent study estimated that about 117 million American adults use e-mail and that over 30 billion e-mail messages are transmitted each day.1 E-mail surpassed postal mail in prevalence several years ago. An estimated 4 trillion e-mail messages were transmitted in 1998, compared with about 101 billion pieces of paper mail.2 Forty-two percent of adults check e-mail daily. The average business employee sends 20 e-mail messages and receives 30 e-mails a day.3 Nearly every political office has a Web site and e-mail address.