Despite advice to avoid doing so, email senders intentionally and unintentionally communicate emotion. Email characteristics make miscommunication likely, and I argue that receivers often misinterpret work emails as more emotionally negative or neutral than intended. Drawing on the computer-mediated and nonverbal communication, emotion, and perception literature, I introduce a theoretical framework describing what factors make miscommunication most likely, how emotional miscommunication affects organizations, and how employees can improve the accuracy of emotional communication in emails. Employees are increasingly likely to use and prefer electronic mail (email) to communicate with coworkers, customers, and other colleagues. The proliferation of email for business communication is likely due to some advantages, such as flexibility and asynchrony, it has over other communication media. Consequently, email has increased information sharing in organizations (Rice, 1987; Sproull & Kiesler, 1986) and has improved productivity among employees separated in time and place (Higa, Sheng, Shin, & Figueredo, 2000). However, the proliferation of email communication has also introduced some challenges not associated with other communication media. Research and theory suggest one likely deleterious effect of email use is harm to workplace relationships. Friedman and Currall (2003) have argued that the characteristics of email increase the likelihood of conflict escalation among those communicating by email. In their study of faculty and staff at a university teaching and research institute, Sarbaugh-Thompson and Feldman (1998) found that as email use increased, the overall volume of all forms of communication decreased, mostly because of fewer "greetings" and other informal interactions between