802d217a9a
Related to https://stackoverflow.com/questions/71667731/spring-integration-mimemessage-gmail-folder-is-not-open-exception If no mail messages pulled from the folder or all of them are filtered out, there is nothing to produce downstream. Therefore, always close the folder in the end of `AbstractMailReceiver.receive()` when no messages and even if `autoCloseFolder == false` **Cherry-pick to `5.5.x`**