I have a number of local folders and I cannot delete messages from one of them. when I select even one message and try to delete it I get the following error message: (There is not enough disk space to download new messages. Try deleting old mail, emptying the Trash folder, and compacting your mail folders, and then try again.) I have tried compacting my folder but that didn't solve the problem. I actually solved this problem already. I forgot that local folders have their own trash folder. It seems that it was full. I just had to empty my local trash folder and I could again delete messages.