15. The computer readable storage medium of claim 11 , wherein such differentiating information is associated with a predefined status.
11. A non-transitory computer readable storage medium storing one or more programs configured for execution by a computer, the one or more programs comprising: instructions for responding to a single search query, including: instructions for searching a message repository to identify a plurality of conversations that include at least one message relevant to the search query, wherein each of the plurality of the conversations includes one or more messages sharing a common set of characteristics that meet predefined criteria, and wherein each of the plurality of the identified conversations includes a respective conversation identifier, and instructions for sending a list of conversations representing at least a subset of the plurality of conversations, wherein at least one of the conversations in the list includes a plurality of email messages; and instructions for providing differentiating information associated with a selected conversation from the list of conversations such that one or more first messages of the selected conversation that do not include text matching the search query are differentiated from one or more second messages of the selected conversation that do include text matching the search query; wherein the instructions providing differentiating information include: instructions for providing formatting information for the first messages in a first format and providing formatting information for the second messages in a second format, wherein the first format differs from the second format in a visually distinctive manner.