David E. Wheeler writes:
On Jul 11, 2008, at 18:31, Sam Varshavchik wrote:No, not really. IMAP defines a lightweight command that returns the number of messages in some folder, not necessarily the current folder. But the mail client has to explicitly issue the command, and it's for one folder at a time. This is pretty much useless, given the demands of modern IMAP clients. But, it is technically possible for an IMAP client to quickly retrieve the number of messages in some arbitrary folder, and check if there's more or less of them.Yes, that's how I would have thought it would work. Why would it be useless?
You have to issue a separate command for each individual folder. You have to explicitly keep issuing it, you won't get anything when it happens, you have to ask for each folder's status, individually.
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