MailUnreadStatusBar... If there is un-read mail of Mail.app in MailUnreadStatusBar, it is the program which the icon of the status bar makes change.
A red circle sticks to the icon if there is un-read in the specified mailbox.
TUISHIMI This just does not work for me. Mac OS X 10.5.2 on an Intel iMac. I load my mailboxes with messages, start this thing up (set to check server) click on update... nothing. I try off-and-on for 5 minutes, nothing. I start mail... loads all the messages that this app should have told me were there to be read. (Version 0.6.1b)