Greetings ( + )!( + ) I'm using OS X 10.5 (upgrade from 10.3) and drag and drop has always worked with Mail in those releases. But perhaps part of the problem is that the mailbox was imported from the other computer and doesn't belong to the owner of the current mailbox owner. If it were me I would take Al's suggestion and delete the "com.apple.mail.plist" located in your home>Library>Preferences! ---------------------------------------------------- On May 1, 2008, at 11:18 AM, Al Poulin wrote: > Now that I understand the way you use Mail, I doubt that Drag and > Drop to the list in the left sidebar will work. But try anyway.