as well as an inbox folder outbox folder and sent folder in the default folder hierarchy an inbox operation 705 creates the inbox folder and assigns a binary value of 254 as the folder id for the inbox folder the inbox operation 705 also sets the value for the parent folder id equal to the folder id of the root folder similarly the outbox operation 706 creates an outbox folder by assigning a binary value of 253 as the folder id for the output folder and setting the value of the parent folder id for the outbox folder to the folder id of the root folder the sent operation 707 creates a sent folder assigning a binary value of 252 as the folder id for the sent folder and setting the value of the parent folder id for the sent folder to equal the folder id of the root folder in one possible embodiment the folder id values for the default root folder u201c other u201d folder u201c embedded u201d folder inbox folder outbox folder ad sent folder are hard coded or reserved referring to fig8 when a user subscribes to a new messaging service the message store system executes several operations including a find next.