Mail is showing one non existing unread message
Hi everyone.
Without any reason or change mai is showing in the dock since a few days one unread message. I tried to find any help via google but no success.. I already marked all mails as read, updatet my inbox.. took a look on my mail account page. Nothing...
Is there anyone who has the same problem, or even better knows whats wrong?!
Thanks so far
OS X Mavericks (10.9)