With the expansion of online interactions and exponential growth of Computer Mediated Communication (CMC), attention is brought to those theories in communication that address the implications of relationships developed within these contexts. In communication courses students learn about both face-to-face (FtF) and CMC relationships and have the opportunity to contrast the quality of interactions, identity management, self-disclosure, and perception formation within both environments. Social Information Processing Theory (SIPT) offers a perspective regarding online interactions by exploring what happens in CMC environments that allows for interpersonal and relational development. SIPT argues that communicators in online interactions are as equally motivated to establish and maintain interpersonal relationships as those involved in FtF interactions. This desire is satisfied in spite of absence of nonverbal communication through the substitution of messages that carry impression-formation and expression-delivery information with those suitable for and available through CMC. Online communicators form initial impressions based on textual information extracted from CMC contexts. They then engage in a variety of "knowledge-generating strategies" to test their first impressions and modify or enhance their impressions. As a result, while CMC interactions take longer and are more dependent on a provision of ample amount of time to test and evolve these first impressions (the provision which is more favorable in FtF interactions), communicators in online settings are able, over time, to gather and construct images of their communication partners that are quite parallel to the images they might have constructed through FtF interactions. Furthermore, SIPT puts forth a hyperpersonal perspective that states that communicators in CMC have the opportunity to be selective in how they can present themselves online by taking time to carefully choose which areas to disclose and which to withhold. This self-selective presentation leads to a more intimate (i.e. hyperpersonal) level in comparison to the FtF communication. The contention is that communicators do not have to worry about how they look, or how to get others to like them, and the sender has the opportunity to "stop and think" about what he/she wants others to know. This creates an opportunity for a friendlier atmosphere in an online interaction, which consequently leads to a development of a stronger relational bond. This article presents an activity using "You've Got Mail" to teach SIPT and hyperpersonal perspective in online interactions. A list of references and suggested readings is included.