4. The method of claim 3 , further comprising: obtaining a set of information pertaining to the received electronic message, wherein the set of information pertaining to the received electronic message comprises: (1) an indication that the received electronic message was sent by a particular participant in the electronic message conversation; and (2) a particular sequence indicator indicating an order in which the received electronic message was sent by the particular participant relative to other electronic messages sent by the particular participant in the electronic message conversation; and updating the electronic message conversation data structure to include the set of information pertaining to the received electronic message.
4. The method of claim 3 , further comprising: obtaining a set of information pertaining to the received electronic message, wherein the set of information pertaining to the received electronic message comprises: (1) an indication that the received electronic message was sent by a particular participant in the electronic message conversation; and (2) a particular sequence indicator indicating an order in which the received electronic message was sent by the particular participant relative to other electronic messages sent by the particular participant in the electronic message conversation; and updating the electronic message conversation data structure to include the set of information pertaining to the received electronic message. 5. The method of claim 4 , wherein determining whether the electronic message conversation data structure is missing information pertaining to a prior electronic message comprises: determining whether the electronic message conversation data structure is missing information pertaining to an electronic message that was sent by the particular participant having a sequence indicator that precedes the particular sequence indicator of the received electronic message.