This paper discusses the ethical issues of electronic mail (e-mail) privacy in the workplace. E-mail is a relatively new technology that begs for the establishment of ethical practices. The nature of e-mail technology and its use make it difficult to apply traditional practices to situations involving e-mail. This paper explains how the legal system has addressed the privacy issue for electronic mail and how the body of knowledge from philosophy may be used to develop ethical guidelines for electronic mail use. Suggestions for ethical use of e-mail systems are provided.