Many firms believe that the best way to inculcate loyalty and retain customers is to establish connections with them through relationship marketing. Unfortunately, only about half of the firms surveyed in a recent study indicated any level of success with it. The significant attention directed toward service classification suggests legitimate differences among service types that may moderate the effectiveness of relationship marketing efforts. This paper proposes a typology of service interactions that takes into account three critical dimensions of relationship marketing: anticipated future interaction, channel of interaction, and customer involvement. Corresponding propositions are offered to guide further research.