I am trying to move mail from an Exim server to a qMail server on a number of accounts and the easiest way to do this is through IMAP since it's universal. However, even though I can move messages from IMAP folders to different servers through Thunderbird, I don't seem to have an option to "copy". Moreover, is there a much easier way to do this? Maybe through some scripted IMAP mailbox copy program? Any help would be appreciated.