IMAPSize is described as 'Portable freeware Windows application that allows you to quickly and efficiently manage your IMAP mail accounts. It is not another mail client. The main purpose of IMAPSize is to locate space consuming folders and allow you to manage them, hence putting your' and is an app in the office & productivity category. There are five alternatives to IMAPSize for a variety of platforms, including Windows, Web-based, iPhone, BSD and Linux apps. The best IMAPSize alternative is MailStore. It's not free, so if you're looking for a free alternative, you could try MailStore or OfflineIMAP. Other great apps like IMAPSize are Mailboxes Usage Monitor and MigrationWiz.
Too complicated, creates own IMAP Folders. Too much bloat stuff.