About GrowlMail GrowlMail is a plug-in for Apple Mail that posts a Growl notification every time new mail arrives containing the text of the message. Installing GrowlMail Quit Mail Open the GrowlMail package that you will find in the Extras folder of your download. Restart Mail. Using GrowlMail You will find the preferences in a new tab of the normal Mail preferences (see image). You can disable