Sieve Email Filtering: delivery by mailboxid

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Last updated 2019-02-13 (latest revision 2018-08-12)
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The OBJECTID capability of the IMAP protocol (I-D.ietf-extra-imap- objectid) allows clients to identify mailboxes by a unique identifier which survives rename. In contrast, the Sieve mail filtering language (RFC 5228) currently has no such capability. This memo defines a Sieve extension that fills this gap: it adds a method for specifying the unique identifier of a mailbox as a target for fileinto rules, and a method for testing the existence of a mailbox by its unique identifier.


Bron Gondwana (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)