Computer mediated communication, in particular email, is of particular importance in the Higher Education sector. In this paper, research at one Higher Education Institution on the ethical use of email is presented. Focus groups were used to gather data on the impact of email, on current patterns of use, and on perceptions of ethical use. Using the analogy of a new motorway, which everyone is expected to use but for which there are no established rules of behaviour or etiquette, the research demonstrates that some ethical guidelines for the acceptable use of email are necessary. It is argued that there needs to be a greater understanding of individual responsibility for computer mediated communication in the higher education sector.