On Tuesday, January 28, 2014 2:44:53 PM CEST, Stephen R. van den Berg wrote:
But everything in one folder; not quite sure if IMAP (the protocol) is
going to be any good at that.

IMAP-the-protocol can be used, but most clients contain code like this:

  open mailbox
  for each message
     do something

The 'do something' bit may be fast, but 'for each message' hurts.

IMAP doesn't force client authors to add that loop, but almost all of them do add it, and it hurts when the mailbox is big. When I tested with a "fast" client years ago, I got two seqscans and a 250MB download every time I opened a million-message mailbox.

Someone told me that there are clients that avoid this. The default iphone client, perhaps? Anyway, finding clients that don't try to download something for each message will be the major challenge.

Arnt

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