Don't you just love a mystery,
Today one of our user ended up with 7 messages that should have been in other users mailboxes, but instead where in his ~/Maildir/cur directory. He could not POP messages because he did not own them. I moved these out and was left with this one message:
?--------- ? ? ? ? ? 1190748252.14706.mail:2,
Cannot cat, less, mv, rm or just about anything this message. I ended up having to move the directory and rebuild it.
Anyone have any clues? The user is a Mac user on OSX, but other than that a pretty ordinary user who has POP-ed and use webmail to check messages.