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RFC8437 - IMAP UNAUTHENTICATE Extension for Connection Reuse
This specification extends the Internet Message Access Protocol (IMAP) to allow an administrative client to reuse the same IMAP connection on behalf of multiple IMAP user identities.
RFC8438 - IMAP Extension for STATUS=SIZE
This document adds a new capability called "STATUS=SIZE" to the Internet Message Access Protocol (IMAP). It allows retrieving the total storage size of a mailbox with a single STATUS command rather than retrieving and summing the sizes of all individual messages in that mailbox.
RFC8440 - IMAP4 Extension for Returning MYRIGHTS Information in Extended LIST
This document defines an extension to the Internet Message Access Protocol (IMAP) LIST command that allows the client to request the set of rights that the logged-in user has been granted on mailboxes, along with other information typically returned by the LIST command.
RFC8457 - IMAP "$Important" Keyword and "\Important" Special-Use Attribute
RFC 6154 created an IMAP special-use LIST extension and defined an initial set of attributes. This document defines a new attribute, "\Important", and establishes a new IANA registry for IMAP folder attributes, which include the attributes defined in RFCs 5258, 3501, and 6154. This document also defines a new IMAP keyword, "$Important", and registers it in the registry defined in RFC 5788.
RFC8474 - IMAP Extension for Object Identifiers
This document updates RFC 3501 (IMAP4rev1) with persistent identifiers on mailboxes and messages to allow clients to more efficiently reuse cached data when resources have changed location on the server.
RFC8508 - IMAP REPLACE Extension
This document defines an IMAP extension that can be used to replace an existing message in a message store with a new message. Message replacement is a common operation for clients that automatically save drafts or notes as a user composes them.
RFC8514 - Internet Message Access Protocol (IMAP) - SAVEDATE Extension
This document adds a new capability called "SAVEDATE" to the Internet Message Access Protocol (IMAP). It defines a new IMAP message attribute called "save date" that, unlike the existing "internal date" attribute, always indicates the moment at which the message was saved in its current mailbox. The SAVEDATE capability extends the FETCH command with the means to retrieve the save date attribute and extends the SEARCH command to allow using the save date attribute in searching criteria.