I moved an IMAP folder with many subfolders and messages to another IMAP folder on the same server (6000 messages with 4 GB data). The process took very long with the eM Client because the folder structure is copied instead of moved. I did the same with Thunderbird and process with moving was very fast. I used the newest eM Client 7.2.34711.0. Is there a trick to make the eM Client faster?