Internet Assigned Numbers Authority

IMAP Mailbox Name Attributes

Last Updated
Available Formats



Plain text

Registry included below

IMAP Mailbox Name Attributes

Registration Procedure(s)
IETF Review or Expert Review
Barry Leiba, Bron Gondwana
[RFC3501, Section 7.2.2][RFC8457, Section 6][RFC9051]
Available Formats

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