E-mail is one of the most used information and communication technologies by organizations. This technology has an enormous potential to transform the way organizations and their processes work. E-mail can speed-up processes and transaction, facilitate information exchange, improve quality, increase employees speed and productivity, and strengthen the relationship with stakeholders. The present paper analysis e-mail usage behavior at work, through empirical data collected in Portugal. The majority of users reveal adequate e-mail usage behavior, in spite of some situations that might prove to be problematic to organizations.