Charles Marcus writes:
« HTML content follows »On 2013-07-11 7:43 PM, Sam Varshavchik <URL:mailto:mrsam@courier- mta.com><mr...@courier-mta.com> wrote:I have no knowledge of the client your user is running, but simply due to the nature of IMAP, a client has to refresh the state of each message in the folder every time the folder gets opened. Since the last time the folder was opened, any message in the folder could've had some message flag, like read/unread, or replied, changed. One of IMAP's technical shortcomings is that a client has no other way to resynchronize other than to download the status of every message in the folder.Which, with that many messages, is going to take a while. Even if you're on a fast LAN, that's still a mind-numbing process.Which is why - after you made it clear that you had no interest in improving IMAP performance of Courier-IMAP by introducing something similar - I switched to dovecot some time ago.Dovecots indexes pretty much eliminate most of these issues, especially if you use mdbox...
Any alleged or potential difference in response time for a particular request does not help when the client croaks when there are hundreds of thousands of messages, in a folder.
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