fix(imap): do a single full sync when QRESYNC is enabled #10035
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Signed-off-by: Richard Steinmetz <[email protected]>
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To minimize the dependence on the cache, we should do a single full sync when
QRESYNCis enabled. This is more efficient as Horde contains (andQRESYNCprovides) shortcuts for this case.This PR also makes sure that only a single sync token is used when
QRESYNCis enabled. It will always be the new message token as it is the first one in the partial sync logic and will trigger the actual full sync.This is a follow-up to #8968. We already force all three criteria when
QRESYNCis enabled and now we are only performing a single call to Horde for syncing.Background
The server reports all changes on the initial
EXAMINEcommand whenQRESYNCis enabled. Only new messages have to be fetched manually afterwards. Changed and vanished messages are reconciled right away without needing to perform any more fetch commands.