I'm playing with Thunderbird as an 'alternative' GUI mail clinet to mutt.
I have it configured OK and reading a remote IMAP server.
The one thing I want to do that I can't see how to do at the moment is copy a folder (or even better a folder hierachy) of messages from the IMAP server to a local folder.
Dragging and dropping the Inbox copied it and the mail messages in it but dragging and dropping other folders seems only to copy the folder but not its contents.