05 January 2006 21:00
RFC 4315 (Obsoletes: 2359) : Internet Message Access Protocol (IMAP) - UIDPLUS extension - M. Crispin - December 2005
"The UIDPLUS extension [...] provides a set of features intended to reduce the amount of time and resources used by some client operations. The features in UIDPLUS are primarily intended for disconnected-use clients".
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