1. A method, comprising: determining whether a received electronic message carries a unique identifier, wherein the unique identifier comprises a machine-generated identifier that is different than user content of the received electronic message; in response to determining that the received electronic message carries the unique identifier, accessing an electronic message conversation data structure that is associated with the unique identifier, the electronic message conversation data structure corresponding to an electronic message conversation comprising the received electronic message and a separately created electronic message, the electronic message conversation data structure comprising information pertaining to each of the electronic messages, to generate a composite electronic message that includes the user content from the received electronic message and user content from the separately created electronic message; and causing the generated composite electronic message to be displayed on a display.
1. A method, comprising: determining whether a received electronic message carries a unique identifier, wherein the unique identifier comprises a machine-generated identifier that is different than user content of the received electronic message; in response to determining that the received electronic message carries the unique identifier, accessing an electronic message conversation data structure that is associated with the unique identifier, the electronic message conversation data structure corresponding to an electronic message conversation comprising the received electronic message and a separately created electronic message, the electronic message conversation data structure comprising information pertaining to each of the electronic messages, to generate a composite electronic message that includes the user content from the received electronic message and user content from the separately created electronic message; and causing the generated composite electronic message to be displayed on a display. 26. The method of claim 1 , wherein the information in the electronic message conversation data structure pertaining to each of the electronic message in the electronic message conversation comprises: (1) an indication of which participant in the electronic message conversation sent that electronic message; and (2) a sequence indicator indicating an order in which that electronic message was sent by that participant relative to other electronic messages sent by that participant in the electronic message conversation.