53. An apparatus, comprising: means for 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; means for accessing an electronic message conversation data structure that is associated with the unique identifier responsive to determining that the received electronic message carries 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 means for generating a composite electronic message that includes user content from the received electronic message the separately created electronic message responsive to accessing the electronic message conversation data structure that is associated with the unique identifier.
53. An apparatus, comprising: means for 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; means for accessing an electronic message conversation data structure that is associated with the unique identifier responsive to determining that the received electronic message carries 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 means for generating a composite electronic message that includes user content from the received electronic message the separately created electronic message responsive to accessing the electronic message conversation data structure that is associated with the unique identifier. 54. The apparatus of claim 53 , further comprising: means for determining whether the electronic message conversation data structure is missing information pertaining to a prior electronic message that is known to have been sent in the electronic message conversation prior to the received electronic message; and means for sending a request electronic message to a human participant of the electronic message conversation to request that the prior electronic message be sent again in response to determining that the electronic message conversation data structure is missing information pertaining to the prior electronic message.