The ways that early adopters of electronic messaging have used electronic mail (e-mail) in the schools were studied using the Unified Network for Informatics in Teacher Education (UNITE) system at the Instructional Technology Center of the University of Kansas. At the time of the study, UNITE was operating in 6 school districts and 16 schools. The UNITE system provides other services of access and planning, but the e-mail functions were the focus of the study. A network analysis was conducted of one-to-one messaging on the e-mail system, with the permission of 65 volunteer users. The largest group of e-mail users was the science teachers (36 percent of the users). The most avid users were the librarians, representing about 24 percent of the users, who corresponded with more individuals and sent more messages. It was evident that constraints on the time of teachers limited their uses of the system. Time, accessibility, and existing routine discouraged teacher use of e-mail and must be considered in any strategy to promote its use. (Contains 22 references.) (SLD)