8.2.2 Re-file and Copy (IMAP4)

Re-file and copy operations to IMAP folders invoked during the off-line state are accumulated in the queue, and reflected in the server side when Wanderlust becomes on-line. If you visit destination folders after off-line re-file or copy, it looks as if messages were appended even in off-line state.

For the safety reasons, messages re-filed off-line are removed from source folders only if their `Message-ID:' match messages on the servers. While the queue is processed, messages that failed to be re-filed or copied to the specified folders are appended to the folder `+lost+found'.