Apple Mail bug
I have noticed that if you setup a mail rule to put emails automatically into a folder (depending on the subject, sender etc) the icon on the dock won't show this as an unread email - it will apparently on recognize emails that are not moved.
I have noticed that if you setup a mail rule to put emails automatically into a folder (depending on the subject, sender etc) the icon on the dock won't show this as an unread email - it will apparently on recognize emails that are not moved.