8. メールボックス名属性

8.1. Snoozed

8.2. Scheduled

8.3. Memos

Snoozed identifies a mailbox where temporarily snoozed messages are stored. It standardizes the storage location but does not define the snoozing mechanism.

Scheduled identifies a mailbox containing composed messages scheduled to be sent at a future time. Supporting clients can use it to review, edit, or cancel scheduled messages.

Memos identifies a mailbox for messages with the $memo keyword. Supporting clients MUST NOT present this mailbox as ordinary messages; instead, memo contents are presented contextually alongside the messages they annotate.