Internet Message Access Protocol (IMAP) Capabilities 2018-06-14 2025-12-22 RFC3501, Section 7.2.2 RFC8457, Section 6 IETF Review or Expert Review Barry Leiba, Bron Gondwana All All messages Archive Archived messages Drafts Messages that are working drafts Flagged Messages with the \Flagged flag HasChildren Has accessible child mailboxes not used by JMAP HasNoChildren Has no accessible child mailboxes not used by JMAP Important Messages deemed important to user Inbox New mail is delivered here by default. RFC8621, Section 10.5.1 JMAP only Junk Messages identified as Spam/Junk Marked Server has marked the mailbox as "interesting" not used by JMAP Memos Identifies the mailbox where user-created memo messages are stored. NoInferiors No hierarchy under this name not used by JMAP NonExistent The mailbox name doesn't actually exist not used by JMAP Noselect The mailbox is not selectable not used by JMAP Remote The mailbox exists on a remote server not used by JMAP Scheduled Identifies the mailbox where messages scheduled to be sent at a later time are stored. Sent Sent mail Snoozed Identifies the mailbox where temporarily snoozed messages are stored. Subscribed The mailbox is subscribed to Trash Messages the user has discarded Unmarked No new messages since last select not used by JMAP