Attribute Name,Description,Reference,Usage Notes
All,All messages,[RFC6154],
Archive,Archived messages,[RFC6154],
Drafts,Messages that are working drafts,[RFC6154],
Flagged,Messages with the \Flagged flag,[RFC6154],
HasChildren,Has accessible child mailboxes,[RFC5258],not used by JMAP
HasNoChildren,Has no accessible child mailboxes,[RFC5258],not used by JMAP
Important,Messages deemed important to user,[RFC8457],
Inbox,New mail is delivered here by default.,"[RFC8621, Section 10.5.1]",JMAP only
Junk,Messages identified as Spam/Junk,[RFC6154],
Marked,"Server has marked the mailbox as ""interesting""",[RFC3501][RFC9051],not used by JMAP
NoInferiors,No hierarchy under this name,[RFC3501][RFC9051],not used by JMAP
NonExistent,The mailbox name doesn't actually exist,[RFC5258],not used by JMAP
Noselect,The mailbox is not selectable,[RFC3501][RFC9051],not used by JMAP
Remote,The mailbox exists on a remote server,[RFC5258],not used by JMAP
Sent,Sent mail,[RFC6154],
Subscribed,The mailbox is subscribed to,[RFC5258],
Trash,Messages the user has discarded,[RFC6154],
Unmarked,No new messages since last select,[RFC3501][RFC9051],not used by JMAP