[Imap-protocol] FLAGS reply

Mark Crispin mrc at CAC.Washington.EDU
Sun Dec 2 00:11:53 PST 2007

On Sun, 2 Dec 2007, Timo Sirainen wrote:

> How about when keywords are removed?

There is no defined mechanism in IMAP to remove keywords. Every time the
question came up the result was a punt.

Although it makes sense to send a FLAGS/PERMANENTFLAGS update to remove a
keyword, I do not recommend doing so for the following reasons:
(1) It may be a keyword which the user intends to use later. Note that
only STORE is defined to create keywords, and some servers won't in
(2) Clients probably are totally unprepared to handle keywords vanishing
in a session (and certainly would be for a keyword that is used in
an existing message).

If there's a need to clean up old unused keywords, do so in a new session.
But you should avoid doing so without a definite need due to reason (1)

-- Mark --

Democracy is two wolves and a sheep deciding what to eat for lunch.
Liberty is a well-armed sheep contesting the vote.

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