Am Mittwoch, den 10.01.2007, 17:39 +0000 schrieb robert burrell donkin:

> when using IMAP, one way to do this is by issuing a SEARCH command
> specifying mailbox and the criteria. AFIAK this command does not
> depend on which mailbox has been selected or the current client state,
> just the data.

No, the SEARCH  command operates on the selected mailbox. And you need
to translate the message numbers.

> this is basically an atomic, stateless operation. there should be no
> need to open a heavyweight session to execute it.

How 'heavyweight' a session is, depends on its implementation. 
If sufficient, an implementation can do just nothing on session
opening. 
Other implementations and backends may require doing some preparation
before giving access to any data.

Joachim



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