Be notified of new email every time you open Dashboard.
MailWidget announces the arrival of new mail. It is a direct extension to Apple Mail. But Apple Mail does not have to run all the time in background. The usage is very simple and intuitive. Download it and try it yourself.
What's new in MailWidget
Resolved issue: iCloud accounts not being shown in OS X 10.9 Mavericks and OS X 10.10 Yosemite