On Fri, 2009-07-31 at 18:40 +0200, Thomas Hummel wrote: > On Fri, Jul 31, 2009 at 12:26:04PM -0400, Timo Sirainen wrote: > > > i.e. Dovecot gets also the next_uid from index file, and starts > > assigning UIDs beginning from it. > > Clear. I probably deleted indexes as well in my test and didn't notice a new > UIDVALIDITY. > > But what about the client's cache ? Does it knows anything about UIDs ?
Most clients cache mails based on UIDVALIDITY and UID, so if UIDVALIDITY changes, it re-downloads all mails. If just UIDs change, then it's handled exactly the same way as if all messages just got expunged and added back, so again it'll re-download them.
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