Systems and methods for storing a plurality of conversations are provided. Each such conversation has a corresponding conversation identifier and one or more messages sharing a common set of characteristics that meet predefined criteria. Information is sent to a remote computer identifying the conversations and providing sufficient information to rank them in accordance with a date/time value of a most recently received message of each conversation thereby causing a first conversation to be ordered before a second conversation. Subsequently, a first message that is deemed to belong to the second conversation is obtained and added to the second conversation. Information is resent to a remote computer identifying the plurality of conversations and providing sufficient information to rank the plurality of conversations in accordance with a date/time value of a most recently received message of each respective conversation thereby causing the first conversation to be ordered after the second conversation.