MailUnreadStatusBar is the software which shows the excuse, number, list of the un-read mail of Mail.app.

- When there is un-read, the total of the number of un-ad is shown at the side of the icon.
- When it clicks on the icon, the number of un-read of mailbox names with un-ad and those mailboxes is shown.
- The mailbox which checks un-read can be chosen.
- The list of the (except for the smart mailbox), un-read mail can be referred to.
- When there is un-read, a notice window can be shown. And, only un-read which met conditions in un-read can be shown.
A condition specifies the string included in From and Subject.
- It is possible that an icon is registered.
- Un-read mail on the mail server can be checked by choosing account. (POP3 , IMAP4 & No SSL)
(The management of SSL may work normally though it is in.)

It may be shown with Mail.app when there is un-read in MailUnreadStatusBar though there is no un-read. Carry out "Rebuild" with Mail.app at this time to the applicable mailbox. This is the old bug of Mail.app, or it is the problem when how to manage mail changes, or it is what I don't know it. It is because it may not correspond to the information during the mail file and the actual information. This is thought to be all right if it is done once.