If you use web fetch mail programs like Gmail, Yahoo! mail, Hotmail etc. in addition to Apple Mail, this application is a must have. The great thing about it is: when you shift-click on "Contact Us" in a website, on "Send Email" in the Address Book, on "Compose Mail" in Google Notifier etc. - a small window appears on your desktop where you can choose to use either Apple Mail or anyone of your web fetch mail programs. I'm writing this because I'm very surprised to see the small number of downloads and I can only assume it is due to ignorance.