A method, system, and computer program product for implementing message mapping of communications is provided. The method includes receiving a communication and a time-stamp of the communication from a messaging system of an originating terminal device and receiving a request to respond to the communication from a messaging system at a recipient terminal device. The request includes a first response and a first selected portion of the communication to which the first response is directed. The method also includes generating an index that defines parameters of the first selected portion in context with the communication and generating a responsive communication that includes the first response and the index. The index is operable for communicating the parameters of the first selected portion to the originating terminal device. The method further includes mapping the responsive communication to the communication via the time-stamp.